Sun and Venus c. Earth and Venus d. Earth and stars 4. Question 8. Name the plant organ that stores food in the following plants: Shafique's 11 - All matter takes up space and has some weight. The size of a shadow depends on the size of the object. 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. They never meet or intersect at any point, even at infinity. (a) a curved line Some factors on which the size and shape of a shadow depend on are:if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'lambdageeks_com-box-4','ezslot_4',836,'0','0'])};__ez_fad_position('div-gpt-ad-lambdageeks_com-box-4-0'); The word umbra comes from the Latin word for shadow. Umbra refers to the innermost region of the shadow that appears to be the darkest. 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 Any explicit account of perception requires a commitment to one of a variety of ontological or metaphysical views. Can you think of a situation where we can see the path of the light? Question 13. Give four examples of transparent objects. Table, chair, blackboard and notebook. As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. Pinhole camera is made up of translucent butter paper. Based on the size of the light, the sharpness of shadow is observed. Shadows are formed because the movement of particles travels in light. Similar to the sunlight, the particles travel and choose a destination. If the destination is an opaque substance, it creates a blurred image based on the object's size. Question 20. (b) reflected ray (c) A thin iron sheet [1] [6] It can be used for the analysis of some small village houses. Example: Sun, bulb, etc. 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 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. The worlds only live instant tutoring platform. His elder brother on observing his pinhole camera found that the hole made by him was quite large. Give four examples of non-luminous objects. . Plywood sheet is a/an (a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc. Shadow is formed when light falls on the opaque body. Answer: Light travels in a (c) opaque objects This is known as reflection of light. (a) inverted Why do we need a shiny surface for reflection? A 6ft tall man casts a shadow having a length of 12ft. The shape of a shadow depends upon the shape of the object. Question 2. It is only a dark region having no colour. So it is a non-luminous body. Question 23. WebA shadow is actually just a space or region, where there is no light since an opaque object is blocking light rays. A virtual image is the apparent convergence of diverging light rays. (c) incident ray Name some luminous objects. Light travels in a curved line. Answer: What is a non-luminous body? From the critical perspective, this study investigated the role of private tutoring in a context of high-stakes testing through Interpretative Shadows only occur during the day. Afterwards rounded shaped images are formed on the earth. Shadow is formed due to the phenomenon of rectilineas propryation of light. Required fields are marked *. (a) curved line Answer: (b) a random way (c) both of these Ans. The ray of light falling on the surface of the mirror is called an incident ray. Now connect to a tutor anywhere from the web. (b) A thin paper sheet WebHow shadows are formed. We know that light propagates in a straight line i.e. Answer: Name some artificial source of light. Answer: (b) opaque object Air and water are translucent objects. The sun, firefly, stars and fire. Stars are Shadow gives information about During sunset and sunset when the angle of elevation is equal to almost 0and therefore the cotangent of the elevation angle() becomes equal to . A shadow is formed when an opaque object comes in the path of light. WebAnswer (1 of 3): Shadows can be very deceptive. Suggest any two ways to do it. A shadow exists because the object absorbs the light. (c) Opaque Question 12. [6] An acoustic shadow refers to a space or area where the propagation of direct sound is occluded or blocked or diverted to another area. How are moon and planets visible to us, though they are not luminous? (c) translucent Shadow is formed due to the phenomenon of rectilineas propryation of light. 1. Question 11. It is called shadow education because it mimics the mainstream curriculum. Example: Sun, bulb, etc. Now, Soumen can see the image of the object. Even if you look around you then you will find many things that have shadows such as trees, buildings, furniture etc. This spreading out is called diffraction. When the object blocks the lights path, then a dark region appears on the other side. (b) translucent objects Contrary to popular belief, the shadow is not entirely dependent on the size and the shape of the object. Question 22. An observer located in the penumbra region sees only a partial eclipse. This results in an area of darkness appearing behind the object. (b) non-luminous Philosophers distinguish internalist accounts, which Question 13. Non - Luminous Object: An object which does not have a tendency to produce light known as a non-luminous object. E.g. Whether a shadow is two-dimensional or three-dimensional? (c) surface Image is seen when light coming from the object after reflection or refraction enters the observess eye. (b) Sun that allows you to see things is called as light. (a) Electric bulb(b) Burning candle(c) Firefly (Jugnu)(d) Oil lamp. If the observer is located within an umbra, then the observer is likely to perceive a total eclipse. (c) opaque 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. Question 19. What is light? The human monkeypox virus (MPXV) was first identified in 1959. Question 5. (a) straight line(b) curved line(c) zig-zag line(d) randomly, (ii) When an opaque object comes in the path of light it forms, (a) an image with colours(b) shadow(c) black and white image(d) depends on the colour of the light. What is an opaque object? When sunlight falls in the leaves of a tree, the gaps between the leaves act as a natural pinhole camera. (d) none of these, Question 32. It is important for the students to go through these NCERT solutions to get knowledge of the type of question asked in the chapter. Answer: (a) transparent object (a) inverted Everywhere else around the opaque object, the light continues in a straight path until it bounces off the ground or wall behind the object. (c) a straight line Penumbra is the less dark part of a shadow. 13.4): a source of light; an opaque object; a screen or irface behind the object. (c) long (b) size of object Question 3. Why should we not look at the sun directly? Does the direction of shadow change during the day? Answer: The objects which emit light of their own are called luminous bodies, e.g., the sun, the stars, etc. Question 25. As when light falls on an object, light gets reflected and this reflected light comes to us which makes the object visible. Correct Answer: Lateral inversion. Answer: An object which allow light to pass through it, is called transparent object, e.g., clear glass, water, etc. Which of the following is a non-luminous object? The following three things are required for a shadow to form (Fig. Non luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, kerosene stove, moon. The term rain shadow is used to describe the place with the dominant wind direction, elevation and other factors that keeps the area dry.Image credit :Meg Stewart,CC BY-SA 2.0, via Wikimedia Commons. Question 3. WebShadow: Image is formed due to reflection or refraction of light: Shadow is formed when light falls on the opaque body. (a) blue Question 4. Luminous objects: An object which has a tendency to produce light are known as luminous objects. Question 3: Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way? (a) transparent Answer: A cylinder object can cast shadows in two ways. 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. Mainly there are two types of object based on their light emitting property: Luminous Objects: An object which has a tendency to produce light are known as luminous objects. Reflection occurs mainly on the mirror surface as incident light gets reflected when it falls on a clear surface and due to reflection the image formed is always erect. image. On the other hand, The sun radiates ultraviolet radiations that could be extremely harmful for our eyes. The object which does not have light of its own is Theory of Relativity - Discovery, Postulates, Facts, and Examples, Difference and Comparisons Articles in Physics, Our Universe and Earth- Introduction, Solved Questions and FAQs, Travel and Communication - Types, Methods and Solved Questions, Interference of Light - Examples, Types and Conditions, Standing Wave - Formation, Equation, Production and FAQs, Fundamental and Derived Units of Measurement, Transparent, Translucent and Opaque Objects, Find Best Teacher for Online Tuition on Vedantu. Question 1. Diffusion of light. How does light travel? (c) erect but laterally inverted Lateral inversion. (a) Pencil Light travels in a _________ line. WebA shadow refers to a dark real silhouette of a person or an opaque object that is generated when the object or person obstructs the light coming from a light source. Answer: Question 2. This property of light is called rectilinear propagation of light. This moist air often comes from the sea or from another large body of water. Question 3. What change in the path of light takes place when light falls on a shiny surface? Answer: The images formed by a mirror are erect and laterally inverted. As we know, the length of the shadow is proportional to the cotangent of the angle of elevation, we can say that, Ans. Question 2. Image formed by a pinhole camera is The colour of the opaque object does not affect the colour of the shadow that is formed. Sometimes, you are able to see the Sun or the Moon behind the clouds. What is mirror? Light is emitted from a source such as the Sun. (b) long We cannot see through an opaque object. This property of shadows has proved out to be very useful for long aided travelers. An object which has a tendency to produce light are known as luminous objects. Three things are required for the formation of shadow, viz a source of light, an object and a screen. A shadow, which is projected over an area at large distances (like light years) is unable to communicate information between the surfaces at such distances with the edge of the shadow. Answer: Question 3. Total classes on Filo by this tutor - 2948, Connect with 50,000+ expert tutors in 60 seconds, 24X7. Monitor is display Output in the computer. Question 17. When a ray of light falls on an opaque object, a dark patch is formed on the other side of the object whether it is on ground or it is on screen present on the other side of the object. It do not occur every month because the Earths orbit around the sun is not in the same plane as the moons orbit around the earth. 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. (b) transparent objects Answer: Real images always form on a screen. (b) erect Question 18. 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. The shadow of a coloured object is also coloured. WebThe philosophy of perception is concerned with the nature of perceptual experience and the status of perceptual data, in particular how they relate to beliefs about, or knowledge of, the world. How is it formed? One mans shadow can be anothers highlight. Answer: The light comes back in the same plan when light falls on a shiny surface. (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. (c) both of these Soumen read the activity 5 given in his textbook on how to make a pinhole camera. What do you see? (c) red 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. (a) Torch Answer: A shadow is a dark outline or image cast by an opaque object that blocks light coming from a source of light. (b) wood (c) translucent objects We can see only in the presence of light. Question 7. 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: The extent of reflection depends upon the shine and smoothness of the surface. Lung cancer may appear as a shadow, with or without a well-defined nodule or mass. (b) incident ray (a) Firefly (Jugnu)(b) Tube light(c) The sun(d) Electric bulb. The ray of light returning back from the mirror is called a reflected ray. Parallel propagation of light. We cannot see through an opaque object. A shadow basically is a sort of image produced when light is blocked. Refer to the Light Shadows and Reflection Class 6 MCQs Questions with Answers here along with a detailed explanation. (a) Plane mirror(b) Pinhole camera(c) A straight pipe(d) Glass slab. The pinhole image of the sun is This is something all of us must have noticed while seeing ourselves in the mirror. What type of images is formed by it? This happens because the positioning of the sun changes throughout the day as it appears to move from east to west. Download Filo and start learning with your favourite tutors right away! Question 16. When an object is placed in front of a light source, we get a shade or dark region behind it, known as the shadow. What would be the length of the shadow of an 8ft tree place in the same surface as that of the man. We can clearly see through a transparent object. Answer: Example: moon. What are incident ray and reflected ray? A shadow is formed only when light rays are blocked by an opaque object. Question 25. Q.1 llaito a shert mole sin the finstory iof doumesfert? Q.9) If you stand before a plane mirror, your left hand appears right. c. Passing of light through object d. All of these. The sky appears to be blue in color due to the same property. (c) circle How does the colour of an opaque object affect the colour of the shadow? Answer: A smooth shining surface, which rebounds the light back in same or in different direction is called a mirror. Required fields are marked *. (b) opaque (c) sometimes long sometime circular (a) Electric bulb What type of images is formed by it? 4. An area of darkness formed by an opaque object obstructing light is called a shadow. What information does a shadow give about an object? (d) none of these, Question 37. (x) Out of these, which one is not a man-made luminous body? Glass sheet is a/an This dark Question 10. (d) lighted match box, Question 3. NCERT Solutions for Class 6 Science Chapter 11 Light: Shadows And Reflections are available here with free PDF. When the object moves, its shadow is likely to expand in terms of dimensions faster than the speed of the objects movements. How will you convert a transparent glass sheet into a translucent sheet? What is the difference between image and shadow?Answer: Question 6. Question 5. It is the outer part of a shadow. Answer: The phenomenon of light bouncing off surfaces is called reflection. : 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. __________ helps us to see objects. Dark patches are produced when light is stopped by opaque objects. Name four natural luminous bodies. PlantsAnimalsHuman BodyPhysicsChemistryQuiz. 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