Answer: This is called solar eclipse. (b) opaque object Find an answer to your question of light. Question 16. Three things are required for the formation of shadow, viz a source of light, an object and a screen. It works on the principle that light travels in a straight line. Answer: The image formed by a mirror is due to _________ of light. The most famous story of acoustic shadows effect on human history occurs not once, but pretty frequently throughout the Civil War, causing many historians to assert that this phenomenon had a significant impact on its outcome. The main reason behind this is due to the Rayleigh scattering. WebA shadow is formed when there is a source of light. What is a pinhole camera? Answer: The difference between shadow and reflection is that a shadow is formed by the blocking of light rays by any object. This enables us to see images. (d) none of these, Question 15. On the basis of ability to pass light through an object, objects are classified into three main groups, i.e., Question 22. Even during the night time which we perceive to be dark there is light from various sources like stars, the moon, street lights, and ambient city lights reflecting off clouds, etc. The formation of shadow of one celestial body on the other is known as What is an opaque object? __________ helps us to see objects. For this, take a cylindrical tube; which can be easily bent. (a) transparent Opaque Object: An object which does not allow passage to light is called an opaque object. The following three things are required for a shadow to form: a source of light. Question 7. 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. The pinhole image of the sun is Question 27. What do you see? (b) translucent She asked everybody to have their lunch after 3 p.m. It is always black, regardless of the colour of the object used to make the shadow. A mirror is an example of E.g. of light. All these solutions are prepared by expert teachers with detailed explanations of every important topic. The moon is a non-luminous body. Note the colour and the size of the shadow. (b) straight line (b) Glass Question 7. In this case, the shadows formed are smaller in length and are cast directly underneath the objects mostly. Light is a form of energy which when falls on the object enables us to see them. Answer: Even though we perceive the shadows edge to travel along a wall, in reality the increase in the length of a shadow is due to a new projection that travels at a speed equal to the speed of light from the interfering object. What is a shadow? (a) transparent objects Answer: Question 5. Web(e) Shadow (v) Formed due to reflection by mirrors (f) Image (vi) Object through which we cannot see clearly (g) Reflection (vi) Phenomenon of changing left to right (h) Lateral inversion (vii) Produces light of its own Question 9. Answer: We need the following in order to see a shadow. Ask your friend to trace out the outline of the shadow on the screen. An Object through which light is completely passed known as transparent object. (a) blue Pinhole camera is used to study the moving objects also. This is known as reflection of light. (d) none of these, Question 4. (d) none of these, Question 25. In a plane mirror our left hand looks like right hand. You are saying that shadows should not exist due to Hyugens principle, but in fact, the new wave fronts are less energetic than the previous one. The image which cannot be projected on to a screen is called . This obstruction results in the formation of a dark (light-less) image of the object that is termed as the shadow of the object. Example: bulb, candle, torch, etc. Some of the differences between an image and a shadow are given in Table. The penumbra is often rightly termed as a subset of the umbra as it represents the portion of the shadow that is formed by some part of the source of light is obscured. It is a form of energy which makes objects visible as we cannot see objects in darkness. It is the outer part of a shadow. Question 1. Non - Luminous Object: An object which does not have a tendency to produce light known as a non-luminous object. Question 17. Answer: Those materials which do not allow light to pass through them, are called opaque objects. An aortic aneurysm is a defect that causes an enlargement of the aorta as it leaves the heart or as it begins to descend through the chest. A shadow is formed only when light rays are blocked by an opaque object. Question 6. Answer: A cylinder object can cast shadows in two ways. Answer: A rain shadow forms when moist winds head towards a set of mountains and get forced upwards by them. Question 3. Question 16. Explain its construction and image formation. Question 9. Question 29. To know more about Transparent, Opaque and Translucent Objects, visit the link below; To know more about Shadow Formation, visit the link below; To know more about Pinhole Camera, visit the link below; A mirror is a surface usually consisting of a glass that reflects light incident on it to form clear erect images. (a) Transparent (c) A thin iron sheet In other words, an umbra represents the part of the shadow where the light gets entirely obstructed by the blocking body. With light coming from a very small source, the shadow's edges are clear and the shadow is well-defined. For example, consider a TV screen. (a) What is solar eclipse? (c) Copper WebStep 1: Explaining the concept, The dispersion of light is the splitting of light into the colors and the total internal reflection is defined when the light ray travel in a denser medium towards the rare medium and its fall of the surface at a critical angle then it gets reflected back inside the initial medium. No light enters the eye from the shadow of the object. Torch, bulb, sun, firefly and a burning candle. Question 15. How does light travel? Question 25. Define opaque objects with example. A shadow exists because the object absorbs the light. A shadow is formed when light hits an opaque object which stops the rays of light from passing through it. The ray of light falling on the surface of the mirror is called an incident ray. Which of the following is a luminous object? Image formed by a plane mirror is _________. It consists of a box made of metal or a cardboard that has a fine hole in one face. The size of shadow totally depends on distance between object Soumen read the activity 5 given in his textbook on how to make a pinhole camera. 2. Communication back in the 1860s was pretty primitive. A translucent object also creates a faint area of darkness. Undergoes lateral inversion (i.e., left-right reversal). When the top circular view faces the shining object, a circular shape shadow is formed. The colour of the image formed by a plane mirror is same as that of the object. (d) Moon, Question 2. An image is different from a shadow. (c) Do you experienced such superstition in your life? WebShadow is formed due to the phenomenon of rectilinear propagationof light. Question 10. (a) I, O, U(b) N, Z, X(c) I, X, E(d) A, E, I. Question 11. (a) star On what factor does the proportion of light that enters an object depend? The opaque obstructing object is capable of blocking the light coming from sun. Sun rays falling on a flying bird form shadow in space. Download Filo and start learning with your favourite tutors right away! Light rays travel from a source in straight lines. Air is (a) inverted During reflection angle of incidence is equal to angle of reflection. An object which allows only a small part of light through it, is called translucent object, e.g., wax paper, fog, etc. Example: Sun, bulb, etc. (c) sun Question 9. What is a shadow? (a) Torch Question 23. Question 1. Solution For Shadow is formed due to the phenomenon of rectilineas propryation of light. What is umbra and penumbra? (c) both of these Name four natural luminous bodies. Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. When Parthiv asked the reason she said, today is solar eclipse at 2:15 p.m. Parthiv made her relaxed and said this is a natural phenomenon and nothing bad or unpleasant things are related to this. (a) luminous A shadow is formed when there is a source of light. The worlds only live instant tutoring platform. (a) planets The colour of the shadow is always black. Image formed by a pinhole camera is _________ down. There are two types of eclipse. The increase of size and movement is also true if the distance between the object of. (b) A thin paper sheet Let us perform an activity to learn about the characteristics of a shadow. (b) erect (d) Parthiv is an intelligent and mature boy with scientific aptitude. The plane mirror shines due to the silver coating. Printer is used to print in the computer. What is mirror? (a) Translucent(b) Opaque(c) Transparent(d) Penumbra. This dark region is called a shadow. A shadow is formed when an opaque object comes in the path of light. Question 16. This happens because light travels in a straight line. Wood, metals, clay and black paper. Candle, bulb, kerosene oil, lamp and torch. (c) surface Answer: A smooth shining surface, which rebounds the light back in same or in different direction is called a mirror. Filo is the worlds only live instant tutoring app where students are connected with expert tutors in less than 60 seconds. Give suitable examples of each objects. Hence, for reflection, shiny surfaces are required. Why shadows are black in colour? Therefore, light travels in a straight line. Air and water are translucent objects. : glass, Translucent objects allow light to pass through them partially. Hope the information shed above regarding NCERT MCQ Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Pdf free download has been useful to an extent. Question 9. Glass sheet is a/an What can you say about the ability of such clouds to transmit light? Answer: E.g. The effective embedded material volume on the bending side of the rivet determines the strength of the Refer to the Light Shadows and Reflection Class 6 MCQs Questions with Answers here along with a detailed explanation. Cot() = L/20mif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lambdageeks_com-leader-1','ezslot_8',838,'0','0'])};__ez_fad_position('div-gpt-ad-lambdageeks_com-leader-1-0'); Your email address will not be published. Answer: Answer: A building having the height of 20m casts a shadow on the ground. The objects which allow light to pass through them are called (c) opaque Class 6 Science Chapter 11 Light: Shadows And Reflections Questions and Answers PDF, Class 6 Science Chapter 11 Light: Shadows And Reflections Extra Questions, Image is formed due to reflection or refraction of light. Example: moon. Light, Shadows and Reflections Class 6 notes - Chapter 11 - BYJUS A shadow generally takes up most of the space behind an opaque item with light right in front of it. A pinhole camera uses a lens to form a real and inverted image. What are translucent objects? On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. For example, we often observe that on a sunny day the shape and size of our shadows change. The unlighted area is called the shadow. When light is incident on a surface, it gets reflected or it bounces back. Question 2. Cellophane sheet is . The object that does not give out light on its own is the Question 18. We can see through a translucent object but the vision would be murky. Stars are (c) erect but laterally inverted The rain shadow effect can typically be seen in mountainous regions due to the flow of the wind. Why is a silvered glass used as a mirror? 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? Now, keeping the positions of the torch and the screen to the torch. Answer: The extent of reflection depends upon the shine and smoothness of the surface. As we know, the length of the shadow is proportional to the cotangent of the angle of elevation, we can say that. Answer: The silvered glass has a smooth surface and the smoothness helps in forming clear image. An object which is known as a source of light. A plane mirror changes the direction of light that falls on it. Answer: Plastic is opaque but glass is _________. Question 4. When the earth comes in between the sun and the moon, the shadow of the earth falls on the moon. WebA shadow is actually just a space or region, where there is no light since an opaque object is blocking light rays. The word antumbra originated from Latin word ante which means before. Umbra refers to the innermost region of the shadow that appears to be the darkest. Classify Objects Based on its Light Producing Property? We cannot see through an opaque object. Try to see a source of light; like a bulb or a candle; through the straight tube. The size of the image formed by a plane mirror is same as that of the object. Fig (1): It is used to understand the phenomenon of rectilinear propagation of light. Save my name, email, and website in this browser for the next time I comment. (c) size of source of light This is something all of us must have noticed while seeing ourselves in the mirror. (d) a zig-zag line, Question 18. To know more about Reflection on a Plan Mirror, visit the link below; Learn more about the Light, Shadows, and Reflections from the topics given below: The energy derived from the sun, a lamp, etc. Question 29. The effective embedded material volume on the bending side of the rivet determines the strength of the Question and Answer forum for K12 Students. Question 30. Which one of the following is the natural source of light? Shadow does not provide any detail about the object, it gives an idea about the shape of the object. It is time to put your knowledge to the test by answering a few questions. To know more about Light Energy, visit the link below; Light takes the quickest path between any two points. Sun and Venus c. Earth and Venus d. Earth and stars 4. The penumbra is a portion of the shadow of an object where only a certain part of the beam of light gets obstructed by the occluding body. We can see only in the presence of light. The image formed by a pinhole camera is erect. This concept is well proved with a smaller size of shadow in the evening and noon and bigger size of shadow in the morning. Reflection of light. 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. Answer: Question 4. Classify the following into transparent, opaque and translucent objects:Wax, spectacles, a heap of salt, a stone, dense smoke, wood, skin, balloon, rubber, membrane of a tabla, blood and milk. Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. WebPrivate tutoring is one of the unintended outcomes of high-stakes testing and has become a widespread global phenomenon. All shadows caused by the sun are made of . Why? Fill in Real images always form on a screen. Question 6. Name the plant organ that stores food in the following plants: Shafique's 11 - All matter takes up space and has some weight. (c) both (a) and (b) What is reflected ray? Any explicit account of perception requires a commitment to one of a variety of ontological or metaphysical views. It is called shadow education because it mimics the mainstream curriculum. Three things are required for the formation of shadow, viz a source of light, an object and a screen. 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. A 6ft tall man casts a shadow having a length of 12ft. The horizontal distance (in kilometers or miles) at which a large dark object can just be seen against the horizon sky in daylight. there is an opaque object in the way of light. Pinhole cameras consist of a closed box having a small pinhole in the front and having translucent screen at the back. (b) translucent and Question 15. Answer: On the basis of the experience, we observe our eyelids are opaque. 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