(b) wood By smearing a thin layer of oil we may convert a transparent glass sheet into a translucent sheet. The center part of the shadow, which gets no light at all, is the darkest region and is called the umbra. We can clearly see through a transparent object. (d) shape of object, Question 28. (b) a random way What is the colour of the image formed by a plane mirror? Example: Sun. 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. light does not bend its path of propagation if the size of the obstructing object is not comparable to the wavelength of light. 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. What is a transparent object? What type of images is formed by it? [6] The length of the shadow also changes from season to season. Shadow of an object is This is called solar eclipse. An observer located in the penumbra region sees only a partial eclipse. With the help of diagrams show solar and lunar eclipses. An object which has a tendency to produce light are known as luminous objects. What are translucent objects? Question 6. The worlds only live instant tutoring platform. that allows you to see things is called as light. Which of the following is a luminous object? (a) the position of the light source Answer: Wood and bricks are the substances through which light does not pass. The difference between shadow and reflection is that a shadow is formed by the blocking of light rays by any object. Philosophers distinguish internalist accounts, which These solutions include answers to all exercise questions given in the NCERT textbook. A shadow is formed when there is a source of light. Answer: Question 14. (a) Pencil Light is the energy that enables us to see. This is called lunar eclipse. 12.Shadow is formed due to the phenomenon of a. Why? 13. It is crucial in the early stage of a geological mapping as it is less time How does light travel? Question 23. Solution For Shadow is formed due to the phenomenon of rectilineas propryation of light. (d) a zig-zag line, Question 18. Match the following items given in Column A with that in Column B: Your email address will not be published. The human monkeypox virus (MPXV) was first identified in 1959. An image is different from a shadow. : Sun and other stars, Objects that do not produce their own light but reflect the light emitted by luminous objects are known as non-luminous objects. A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen. The shadow of an object is erect i.e same side up as the object. For example imagine a green surface, it would absorb light in that range of the visible spectrum. On the basis of this experience, state whether your eyelids are transparent, translucent or opaque. image. 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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. (b) Sun Moon reflects the light of sun in the night. In solar eclipse moon is between a. Answer: What is an eclipse? All opaque objects do not cast shadows. (b) He made a larger hole instead of a fine hole. What is an incident ray? Pinhole camera is used to study the moving objects also. This is the reason we can see objects in a pinhole camera. Parallel lines are two straight lines that are always the same distance apart. All these sources emit light that produces dim and diffused shadows during the nighttime or dark. (x) Out of these, which one is not a man-made luminous body? Class 6 Science Chapter 11 Light: Shadows And Reflections From Extra Questions section includes multiple choice questions (MCQs), short and answer type questions etc. Answer: Question 4. However, the infection started to spread in 2017 to non-endemic regions such as North and South America, Europe, and Asia. (c) circle (d) none of these, Question 4. Answer: Question 28. WebShadows are formed because: A Opaque bodies allow the light to pass through them B Light can bend around the opaque bodies C Light rays cannot pass through the opaque (d) What value of Parthiv is shown here? : glass, Translucent objects allow light to pass through them partially. Shadow is formed due to the phenomenon of rectilineas propryation of light. On the basis of ability to pass light through an object, objects are classified into three main groups, i.e., The word antumbra originated from Latin word ante which means before. while tracing paper is . (b) reflected ray An Object through which light is completely passed known as transparent object. The wall or ground behind the opaque object is the screen. How is it formed? Answer: When a ray of light falls on a smooth and shiny surface, the whole of light is sent back in the same medium. Question 7. Does the colour of the object affect the colour of the shadow? Name the plant organ that stores food in the following plants: Shafique's 11 - All matter takes up space and has some weight. (a) Transparent This dark region is called a shadow. Communication back in the 1860s was pretty primitive. This dark patch is called shadow. (b) incident ray Explain its construction and image formation. (c) transparent object What do we need in order to see a shadow? (c) both (a) and (b) Question 4. (a) opaque objects Question 10. Question 5. 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. We can clearly see through a transparent object. One can see clearly through these objects. The image formed by a plane mirror is erect but laterally inverted. Answer: Moon is a non-luminous body because it shines by reflecting the sunlight falling on it. Required fields are marked *. 2. (c) translucent objects (c) Opaque This results in an area of darkness appearing behind the object. The ray of light returning back from the mirror is called a reflected ray. (b) Translucent objects: Objects through which light can pass partially and through which we cannot see clearly are called translucent objects, e.g., greased paper, wax paper, butter paper, etc. (a) a shadow This explains why we cannot see a shadow in the dark. Moon does not emit light of its own. The dark area is called a shadow. Mirrors do not allow even a small amount of light to pass through them. WebShadow refers to the dim areas adjacent to buildings or features which are generated by the solar rays and the position of the Sun. (c) eclipse Question 26. Example: moon. This phenomenon of bouncing back of light is known as reflection. (b) non-luminous An opaque object blocks the light falling on it. (a) Electric bulb It is a form of energy which makes objects visible as we cannot see objects in darkness. What is reflection? The colour of the opaque object does not affect the colour of the shadow that is formed. We know that light propagates in a straight line i.e. Answer: The shape and size of an objects shadow is affected by the positioning of the light source. What is a luminous object? of light. 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. On which property of light a pinhole camera does work? Answer: No, to see the reflection, source of light is required. Question 3. What do you see? This is something all of us must have noticed while seeing ourselves in the mirror. the light ray falling on the opaque object is blocked by it. Define opaque objects with example. Question 14. Why is a silvered glass used as a mirror? (d) none of these, Question 12. (b) opaque object An acoustic shadow refers to a space or area where the propagation of direct sound is occluded or blocked or diverted to another area. (a) shape of the object A mirror is an example of Since then, the incidence of the disease has been sporadic. (c) a black and white image As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. (c) Electric light (d) Soumen got upset easily without looking and inspecting the actual cause, he is bit careless in doing his activity. Download Filo and start learning with your favourite tutors right away! WebEarth's shadow (or Earth shadow) is the shadow that Earth itself casts through its atmosphere and into outer space, toward the antisolar point.During the twilight period (both early dusk and late dawn), the shadow's visible fringe sometimes called the dark segment or twilight wedge appears as a dark and diffuse band just above the horizon, most Answer: (c) a straight line Question 20. 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. (a) A light ray falling on a smooth, shiny and polished surface (say a plane mirror) is called the incident ray. Now connect to a tutor anywhere from the web. Aim: To observe differences between the image and the shadow of the same object. (a) When the earth, moon and sun are in a straight line, with moon in between, the shadow of moon falls on the earth and this is known as solar eclipse. 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. step 2: Conclusion, Now, keeping the positions of the torch and the screen to the torch. Substances through which light can pass partially and things cannot be seen clearly through them are An object which does not have its own light is called a non-luminous object, e.g., chair, moon, etc. Question 26. Answer: Those objects which allow light rays to pass through them completely are called transparent objects. 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. 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