(b) size of the object (c) A thin iron sheet We have grown leaps and bounds to be the best Online Tuition Website in India with immensely talented Vedantu Master Teachers, from the most reputed institutions. Correct Answer: Sun and Earth. In the picture above, we can see that the shadow of an opaque object (ball) is formed on the screen when the object is placed in front of an extended source of light. On dark nights a little illumination by moon enables us to see things around us. (a) Firefly (Jugnu)(b) Tube light(c) The sun(d) Electric bulb. Answer: Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, kerosene stove, sun, firefly, moon. step 2: Conclusion, Shadows only occur during the day. The size and shape of the shadow of an object can depend on a number of factors. The shadow from an annular eclipse (when the moon appears smaller than the sun during an eclipse, and so a ring of light is visible around it) is called an anteumbra. E.g. Answer: Mirror is silvered on one side, so it does not allow the light to pass through it. All these questions are very important from examination point of view. The image which cannot be projected on to a screen is called . The glass sheet having a polished, shiny, smooth and reflective surface on the other side is called a mirror. . In case if the incidence angle is smaller, shadow is longer. (a) transparent objects Objects that do not have light of their own are called __________ objects. (d) none of these, Question 12. The term Shadow is frequently used for any form of obstruction or blockage and not just the obstruction of light. Question 1. Question 6. This phenomenon is a. Question 25. Question 18. Answer: When l = 0 or 0.25, the material flows to the outside of the rivet, and a vortex-like phenomenon is formed at the chamfered position. This phenomenon of bouncing back of light is known as reflection. An object which allows partial passage to light is called a translucent object. of light. This is the reason we can see objects in a pinhole camera. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. However, it cannot block the ambient light of the sky that has a bluish tinge due to the scattering of blue light by the atmosphere molecules more effectively. (d) lighted match box, Question 3. Answer: The shadows actual length on the ground is proportional to the cotangent of the elevation angle of the Sun () with respect to the horizon. Hold the screen on the other side of the object to get the shadow. This results in an area of darkness appearing behind the object. What is lateral inversion? This explains why we cannot see a shadow in the dark. (d) colour of the source light, Question 22. (a) On which principle of light does a pinhole camera works? Shape of the Sun is round, so when we see the sun from any angle we get a circle only. (c) The finer will be the hole the sharper will be the image formation and vice versa. He was very upset. (d) none of these, Question 24. Luminous objects: An object which has a tendency to produce light are known as luminous objects. (b) blue Stars are It is time to put your knowledge to the test by answering a few questions. The size of a shadow is relative to the __________ of source of light with respect to the object. In this article, we will discuss about shadow formation, umbra and penumbra, characteristics of shadows. __________ helps us to see objects. Why should we not look at the sun directly? (d) none of these, Question 4. The plane mirror shines due to the silver coating. Question 3. Shadows are formed by light, because if light shines onto an object, and the object blocks the light, the light will go sideways of the object, and therefore, a shadow is formed. Most shadows are made up of the umbra and the penumbra. All light is blocked by an opaque object in the umbra. (b) A thin paper sheet We cannot see through an opaque object. When the top circular view faces the shining object, a circular shape shadow is formed. Answer: the light ray falling on the opaque object is blocked by it. Pinhole camera is made up of translucent butter paper. (b) long The word antumbra originated from Latin word ante which means before. Image source: C. G. P. Grey,British Library Gate Shadow,CC BY 2.0. (a) image Total classes on Filo by this tutor - 2948, Connect with 50,000+ expert tutors in 60 seconds, 24X7. This enables us to see images. This happens because the positioning of the sun changes throughout the day as it appears to move from east to west. Question 7. Close your eyes while looking towards bright sunshine. Question 20. NCERT Solutions for Class 6 Science Chapter 11 Light: Shadows And Reflections are available here with free PDF. (b) non-luminous there is an opaque object in the way of light. Answer: (c) both (a) and (b) (c) both of these Shadow of an object is always Now, keeping the positions of the torch and the screen to the torch. The size of the image formed by a plane mirror is same as that of the object. Transparent Object: An Object through which light is completely passed known as transparent object. Answer: Yes, the direction of shadow changes as the sun changes its position during the day. (b) a coloured image (d) A thin wooden sheet, Question 17. Wood, metals, clay and black paper. WebPrivate tutoring is one of the unintended outcomes of high-stakes testing and has become a widespread global phenomenon. Answer: In a dark room, we can see with torch light which goes straight. Objects that give out or emit light of their own are called __________ objects. During day time sunlight acts as a source of energy which makes everything visible whereas at night we use artificial sources of light for seeing objects. A shadow is formed only when light rays are blocked by an opaque object. NCERT solutions for class 6 science Chapter 11 contain various type of questions like match the following, fill in the blanks, MCQ and long answer questions. The object which does not have light of its own is (a) transparent object Give four examples of transparent objects. (d) none of these, Question 37. (a) reflected ray Clear glass, clean water, cellophane paper and air. In pinhole camera, the image is free from spherical and . Classification of Object Based on Tendency to Produce Light. (c) transparent object Its all about contrast. It is always black, regardless of the colour of the object used to make the shadow. Answer: Screen is a surface on which images are formed. Question 9. Answer: Question 4. Example: Sun, bulb, etc. These solutions include answers to all exercise questions given in the NCERT textbook. When its curved side faces the shining object, it casts a rectangular shadow. Answer: It is a device which forms a photograph like image of a bright object on a screen. Q.9) If you stand before a plane mirror, your left hand appears right. If the angle of elevation of the sun is 53, find the length of the shadow. Answer: A shadow is a dark outline or image cast by an opaque object that blocks light coming from a source of light. Do you notice any difference? Printer is used to print in the computer. Aim: To obtain a shadow and study its characteristics Materials needed: A torch, a few small opaque objects of different shapes and sizes and a white screen (a piece of cardboard covered with white paper). What are transparent objects? Justify. Give four examples of opaque objects. Question 7. Substances through which light can pass partially and things cannot be seen clearly through them are Let a beam of light pass through the comb on the mirror using a torch. Web(i) Shadow: A dark patch formed behind an opaque body, when placed in the path of light. Your email address will not be published. The phenomenon of light bouncing off surfaces is called reflection. Sun is a source of shadow to form. A shadow is formed when the sun's rays are traveling in your straight line towards the earth. The rays of the sun radiate outwards and these light rays travel nearly 300,000 km/sec in a straight line towards the earth. These light rays take only 8 minutes to reach us. It directly touches the path on the ground. Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. Now connect to a tutor anywhere from the web. (c) sun Question 4. Question 16. Is always black, regardless of the colour of the object. Man Made Source of Light: Source of light which is prepared by humans is known as man made source of light. Example: Sun, bulb, etc. The pinhole image of the sun is (a) luminous What information does a shadow give about an object? What is a pinhole camera? Lung cancer may appear as a shadow, with or without a well-defined nodule or mass. When a light ray returns back after striking the surface of the plane mirror is called (b) incident ray Monitor is display Output in the computer. For example, we often observe that on a sunny day the shape and size of our shadows change. Question 14. Shadows will always be formed on the opposite side of the light source. Question 19. The colour of the image formed by a plane mirror is same as that of the object. (c) surface What is natural pinhole camera? the light ray falling on the opaque object is blocked by it. Soumens teacher asked their class to make a pinhole camera by themselves. Question 12. The phenomenon of formation of shadows of celestial bodies on one another is called an eclipse. Why is the moon not considered as a luminous body? Take the example of a comb placed in front of a mirror over a dark coloured paper. During reflection angle of incidence is equal to angle of reflection. Answer: Answer: List four natural sources of light.Answer: Question 12. (vii) Which letters of English alphabet will not show lateral inversion? Aim: To observe differences between the image and the shadow of the same object. Answer: Objects which does not allow light to pass through them are called In other words, an umbra represents the part of the shadow where the light gets entirely obstructed by the blocking body. A pinhole camera uses a lens to form a real and inverted image. (a) shining mirror Material needed: A mirror. The main reason behind this is due to the Rayleigh scattering. Sun is the universal source of light. WebShadows are made by blocking light. The distance between the umbras apex and the Moon appears to be approximately equal to the distance from the Moon to Earth i.e. If we try to view the object and the source from the apex of the cone, then the two bodies would seem to be of the same size. The difference between shadow and reflection is that a shadow is formed by the blocking of light rays by any object. Benign tumors may similarly appear as a shadow or a spot. Define opaque objects with example. Question 7. This is known as reflection of light. Question 19. while tracing paper is . The effective embedded material volume on the bending side of the rivet determines the strength of the Question 12. (d) none of these, Question 31. The diameter of the Earth is about 3.7 times that of the Moon, therefore, the umbra ranges respectively beyond an estimated 1.4 million km or 870,000 mi. What are the two types of eclipse? Method: Observation: The shadow becomes bigger when the object is moved closer to the torch and smaller when it is moved closer to the screen. (a) Electric bulb Answer: In areas where the amount of received rain is low or the area is very dry, the term rain shadow is used to describe the place with the dominant wind direction, elevation and other factors that keep the area dry. Suggest any two ways to do it. Which types of objects do not allow light to pass through them? What is an eclipse? Answer: Justify. The partial dark region of a shadow around the umbra that gets light from some parts of the source of light is called the penumbra. (c) opaque objects (a) reflected ray question_answer Answers (8) a shadow is caused by an object blocking light so that it does not reach a surface.The area in shadow appears black because there is no light falling on it----it appears dark. image. The shape of shadow depends upon the (c) both (a) and (b) the light ray falling on the opaque object is blocked by it. (c) Copper NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 8 Social Science, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. Real images always form on a screen. Question 22. Which of the following is a non-luminous object? Answer: The antumbra refers to the portion of the shadow from which the obstructing object appears to be placed completely within the central region of the light source. (d) Chair, Question 6. If you stand before a plane mirror, your left hand appears right. (a) luminous Give four examples of non-luminous objects. Silverness makes the surface shiny which helps in reducing the absorption of light falling on the mirror surface. Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. Question 9. The increase of size and movement is also true if the distance between the object of. Question 17. Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Solutions. Answer: Connect with 50,000+ expert tutors in 60 seconds, 24X7 Ask a (c) translucent Light travels in a Question 4. 1. 11 Facts On Wind Energy (Beginners Guide! Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. Question 16. Cellophane sheet is . What type of images are formed by a pinhole camera? Question 8. Question 1. It allows geologists to analyze the distinguishing geological features and structures, plant cover, past history of the site, soil properties, and topography of the study area. (a) luminous Dark patches are produced when light is stopped by opaque objects. Question 3. Soumen read the activity 5 given in his textbook on how to make a pinhole camera. Image formed by a pinhole camera is Question 1. The dark patches formed behind an opaque object when it does not allow light to pass through it are called shadows. Question 2. NCERT Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers will help to score more marks in your CBSE Board Exams. "There are two Now, cover the eyes with your palm still keeping them closed. It is a form of energy which makes objects visible as we cannot see objects in darkness. (c) long Which one of the following is the natural source of light? A shadow subjugates the entire three-dimensional volume of light approaching an object from behind. Question 1. (c) Yes, many a times by my grandmother. Survelliance mirror, Your Mobile number and Email id will not be published. Example: moon. This explains why we cannot see a shadow in the dark. What are incident ray and reflected ray? aberrations. We cannot see through an opaque object. Three things are required for the formation of shadow, viz a source of light, an object and a screen. Light travels in The word penumbra originated from the Latin word paene which means almost or nearly. With two point sources, there would be two separate shadows. (a) inverted The size of the umbra and penumbra depends on various factors such as the size of the source, size of the object, and the distance between the source and the object as well as the distance between the object and the screen. (c) incident ray Shadows give us an idea about the shapes of different objects. (d) all of these, Question 38. Tamilnadu Board Class 10 English Solutions, Tamilnadu Board Class 9 Science Solutions, Tamilnadu Board Class 9 Social Science Solutions, Tamilnadu Board Class 9 English Solutions, MCQ Questions for Class 6 Science with Answers, MCQ Questions for Class 6 Science Chapter 10 Motion and Measurement of Distances with Answers, MCQ Questions for Class 6 Science Chapter 12 Electricity and Circuits with Answers, The Hundred Dresses Part 2 Class 10 MCQ Questions with Answers English Chapter 6, What Is Modernism In Literature? A shadow may be defined as the dark area caused by an opaque object when it prevents light from passing to the other side. (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. The position of the shadow changes with the . Since then, the incidence of the disease has been sporadic. Answer: Question 4. ), Element 115, Moscovium:7 Interesting Facts. It is only when light rays are obstructed by an opaque object that we get a shadow of the object. Question 9. (d) none of these, Question 30. His elder brother on observing his pinhole camera found that the hole made by him was quite large. We consider moon as non-luminous body but still we can see things on a full moon night. (a) Pencil Answer: Question 1: Rearrange the boxes given below to make a sentence that helps us understand opaque objects. (d) none of these, Question 25. What is the difference between image and shadow?Answer: Question 6. For this, take a cylindrical tube; which can be easily bent. Sometimes, you are able to see the Sun or the Moon behind the clouds. Question 1. A torch is a Shadows do not give us any information about the shapes of objects. Question 3. The worlds only live instant tutoring platform. A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen. E.g. With light coming from a very small source, the shadow's edges are clear and the shadow is well-defined. According to NASAs Navigation and Ancillary Information Facility, the portion present in the umbra is also within the penumbra. Which of the following is a luminous object? Eventually, we can observe that if the height of the fence is not enough, then the pattern of light would move towards the shadow diamonds and light outlines. We provide you year-long structured coaching classes for CBSE and ICSE Board & JEE and NEET entrance exam preparation at affordable tuition fees, with an exclusive session for clearing doubts, ensuring that neither you nor the topics remain unattended. Name some artificial source of light. (d) none of these, Question 5. That is why mirrors reflect most of the light falling on it. This moist air often comes from the sea or from another large body of water. WebShadow is formed due to the phenomenon of rectilinear propagationof light. (a) reflection The glass sheet of plane mirror offers a . (b) wood The position of the shadow changes with 1. Therefore, it can be said that the two factors are proportional. c. Passing of light through object d. All of these. The endemic regions were identified in Africas central and western areas. Shadow is formed due to the phenomenon of rectilineas propryation of light. It is to be noted that the communication between different points in a shadow does not exist except for the phenomenon of reflection or interference of light which occurs at the speed of light. It works on the principle that light travels in a straight line. What happens when light falls on a mirror? Question 10. What is a shadow? Answer: When a ray of light falls on a smooth and shiny surface, the whole of light is sent back in the same medium. 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