Question 2. (d) Soumen got upset easily without looking and inspecting the actual cause, he is bit careless in doing his activity. This is why we should never see the sun with naked eyes. 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. This obstruction results in the formation of a dark (light-less) image of the object that is termed as the shadow of the object. Question 14. One mans shadow can be anothers highlight. (a) shape of the object What type of images is formed by it? E.g. Some common examples of sources of light are sun, bulb,etc. What is a luminous object? Air and water are translucent objects. Answer: Screen is a surface on which images are formed. That is why mirrors reflect most of the light falling on it. 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. Question 30. Answer: The wall or ground behind the opaque object is the screen. Example: Sun, bulb, etc. Answer: The extent of reflection depends upon the shine and smoothness of the surface. 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. It is the outer part of a shadow. 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. Candle, bulb, kerosene oil, lamp and torch. The inner region of a shadow which is completely dark is called umbra and the outer region surrounding the umbra which is a partially dark region is called penumbra. Answer: The word penumbra originated from the Latin word paene which means almost or nearly. The material which allows light to pass through it is A real image is formed by actual convergence of light rays. It glows due to reflection of sunlight by it. (b) incident ray If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. the light ray falling on the opaque object is blocked by it. Question 2. Answer: A shadow is a dark outline or image cast by an opaque object that blocks light coming from a source of light. Justify. Connect with 50,000+ expert tutors in 60 seconds, 24X7 Ask a (a) the position of the light source What is natural pinhole camera? A pinhole camera is a device which forms a photograph like image of a bright object on a screen. The sun radiates ultraviolet radiations that could be extremely harmful for our eyes. A torch is a A shadow can be said to be a spot on a surface where the amount of light is less compared to the amount of light the area surrounding that spot. An object which does not have a tendency to produce light known as a non-luminous object. Question 18. (c) opaque objects Question 7. Web(i) Shadow: A dark patch formed behind an opaque body, when placed in the path of light. 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) sometimes erect, sometimes inverted Any explicit account of perception requires a commitment to one of a variety of ontological or metaphysical views. Answer: WebAnswer (1 of 3): Shadows can be very deceptive. Answer: 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. Question 4. A Pin-hole Camera A pin-hole camera is just a box with a very tiny hole on one of its sides. Question 3. Try to see a source of light; like a bulb or a candle; through the straight tube. This happens because the positioning of the sun changes throughout the day as it appears to move from east to west. Answer: (a) A thin sheet of paper(b) A thin glass slab(c) A thin iron sheet(d) All of these, (v) Bouncing back of light from shining surfaces is called, (a) Reflection(b) Refraction(c) Bending(d) Dispersion, (a) Image becomes inverted(b) Image bends laterally(c) Right of the object appears left of the image(d) All of these happen, Answer: (c) Right of the object appears left of the image. MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations with Answers, Determiners Exercises for Class 10 CBSE With Answers, NCERT Solutions for Class 10 English First Flight Chapter 4 From the Diary of Anne Frank, NCERT Solutions for Class 9 Social Science Geography Chapter 2 Physical Features of India, Concise Mathematics Class 10 ICSE Solutions. Source of light which is already present in nature known as natural source of light. A shadow is the cross section of that volume of light in the form of a two-dimensional silhouette, or an inverse projection of the person or the object obstructing the propagation of light in space.Shadow demonstrating transverse reversal effect. A shadow has the following three characteristics: A very interesting phenomenon occurs when an object forms an image by reflection. Image formed by a plane mirror is _________. (d) glass, Question 34. The formation of shadow of one celestial body on the other is known as The ray of light that falls on a plane mirror is called Question 10. Sun is the universal source of light. image. Answer: 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. Why is the image formed in a pinhole camera inverted? This spreading out is called diffraction. Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. Since the man and the tree is on the same surface they must be facing the same elevation angle from the light source. Question 29. Name some luminous objects. How will you convert a transparent glass sheet into a translucent sheet? As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. Ans. 11. A shadow is a dark shape made when light is stopped or blocked by an object or a person. (c) both (a) and (b) What would be the length of the shadow of an 8ft tree place in the same surface as that of the man. During sunset and sunset when the angle of elevation is equal to almost 0and therefore the cotangent of the elevation angle() becomes equal to . This seeming left-right reversal is called lateral inversion. Answer: (b) lighted match-stick Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. List four natural sources of light.Answer: Question 12. Question 26. Answer: When a ray of light falls on a smooth and shiny surface, the whole of light is sent back in the same medium. the contrast between the shadow and the surrounding area is much more and therefore, we can clearly see the shadow formation. (c) both of these Question 24. 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. Question 2. Answer: Umbra is the dark region behind the object facing light which does not receive light at all. Question 17. Turn on the torch and place the object (whose shadow you want to study) in front of it. Why lunar eclipse not occur every month? (c) Tube light Diffusion of light. 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. An area of darkness formed by an opaque object obstructing light is called a shadow. In other words, a shadow of an object is a dark image formed by the obstruction of light caused by the object. Shadow is formed due to the phenomenon of rectilineas propryation of light. Question 19. Torch, bulb, sun, firefly and a burning candle. Shadow is formed due to a. Rectilinear propagation of light. On which property of light a pinhole camera does work? (c) opaque This phenomenon is a. (b) Glass (c) both (a) and (b) Image is seen when light coming from the object after When an opaque object is placed in its way, a dark patch is formed behind the object. (a) Torch Which types of objects do not allow light to pass through them? This results in an area of darkness appearing behind the object. Write two differences between a shadow and an image. (a) transparent Darkness is rather subjective. The shadow of a coloured object is also coloured. (d) translucent, Question 7. A shadow is always formed on the side opposite to the source of lightwith respect to an opaque object. When the top circular view faces the shining object, a circular shape shadow is formed. Filo instant Ask button for chrome browser. The shadow we see while in the path of totality is called the umbra, and the shadow of the surrounding partial eclipse is a penumbra. 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. Question 1. What is a shadow? A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen. the light ray falling on the opaque object is blocked by it. A shadow will not form if any of these is absent. Let us perform an activity to learn about the characteristics of a shadow. During reflection angle of incidence is equal to angle of reflection. A virtual image is the apparent convergence of diverging light rays. The colour of the opaque object does not affect the colour of the shadow that is formed. The main reason behind this is due to the Rayleigh scattering. Light falls on the hole, and an inverted image is formed on the side opposite to the hole. It basically describes the scarcity of rain in an area. A firefly is a luminous body. An Object through which light is completely passed known as transparent object. Benign tumors may similarly appear as a shadow or a spot. When the sun is located directly overhead i.e. His elder brother on observing his pinhole camera found that the hole made by him was quite large. This is the reason we can see objects in a pinhole camera. When a light ray returns back after striking the surface of the plane mirror is called The dark patch formed due to obstruction of light rays by an opaque object is called a shadow. Question 18. It is formed when light ray falling on the surface of the mirror (say an opaque object) is blocked by it. Objects that do not give out or emit light of their own are called | Origins, Parts and Themes of Literature Modernism, Tili Kannada Text Book Class 5 Puraka Odu Gadhe Mathugalu, We Are Not Afraid To Die If We Can All Be Together Summary in English by Gordon Cook and Alan East, MCQ Questions for Class 10 English with Answers First Flight, Footprints Without Feet, A Thing of Beauty Summary in English by John Keats, Were Not Afraid to Die If We Can All Be Together Class 11 MCQ Questions with Answers English Chapter 2, Samuchaya Bodhak , Conjuction In hindi, The Browning Version Summary in English by Terence Rattigan, Deep Water Summary in English by William Douglas, MCQ Questions for Class 9 Civics Chapter 1 Democracy in the Contemporary World with Answers. We have compiled the NCERT MCQ Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Pdf free download covering the entire syllabus. 4. A smooth, polished reflecting surface is called a mirror. a swap occurs between the light and dark areas when the object gets farther from the surface of the projection. Pinhole camera is made up of translucent butter paper. (d) none of these, Question 15. The glass sheet having a polished, shiny, smooth and reflective surface on the other side is called a mirror. (b) a random way Q. light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of light. Answer: "There are two (c) Yes, many a times by my grandmother. 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. He was very upset. (b) opaque object Question 12. What type of images are formed by a pinhole camera? Name some artificial source of light. Answer: The following three things are required for a shadow to form: a source of light. It reflects almost whole of the light falling on it. 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. (c) light bulb Everywhere else around the opaque object, the light continues in a straight path until it bounces off the ground or wall behind the object. 1) Ipre early maan uralked on floot and Carried loadle on his leane. Hold the screen on the other side of the object to get the shadow. In this page, we are providing Light Shadows and Reflection Class 6 Extra Questions and Answers Science Chapter 11 pdf download. Question 7. The pinhole image of the sun is rectangular. (a) Transparent Light travels in a _________ line. 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. An object which does not have its own light is called a non-luminous object, e.g., chair, moon, etc.

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