Lakhmir Singh - Class 10 Physics Chapter 5 all questions
Answers
"(a) Explain why, a stick half immersed in water appears to be bent at the s.....
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"The diagram given alongside shows a ray of light entering a rectangular blo.....
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"(a) With the help of a labelled diagram, explain why a tank full of water a.....
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"(a) With the help of a diagram, show how when light falls obliquely on the .....
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"Light travelling from a denser medium to a rarer medium along a normal to t.....
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"Which of the following diagrams shows the ray of light refracted correctly?.....
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"When a ray of light travelling in glass enters into water obliquely
(a) it .....
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"(a) How can you bend light away from the normal?
(b) How must light travel .....
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"Why does a beam of light when it enters glass at an angle? Why does it not .....
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"Fill in the following blank with a suitable word
When a ray of light goes f.....
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"The speed of light in air is 3 × 108 m/s. In medium X its speed is 2 × 108 .....
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"The speed of light in vacuum and in two different glasses is given in the t.....
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"(a) State and explain the laws of refraction of light with the help of a la.....
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"The refractive indices of four materials A, B, C and D are 1.33, 1.43, 1.71.....
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"The refractive indexes of four substances P, Q, R and S are 1.77, 1.50, 2.4.....
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"The refractive index of glass with respect to air is 32 and the refractive .....
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"The following table gives the refractive indices of a few media 1
2
3
4
5
M.....
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"Draw the given diagram in your answer book and complete it for the path of .....
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"Draw a ray diagram to show the formation of a real magnified image by a con.....
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"Describe with the help of a ray diagram the nature, size and position of th.....
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"(a) With the help of a labelled diagram, explain how a concave lens diverge.....
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"(a) With the help of a labelled diagram explain how a convex lens converges.....
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"Draw a diagram to show how a converging lens held close to the eye acts as .....
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"(a) An object is placed well outside the principal focus of a convex lens. .....
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"Draw ray diagrams to represent the nature, position and relative size of th.....
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"(a) Explain what is meant by a virtual, magnified image.
(b) Draw a ray dia.....
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"(a) Explain why, a real image can be projected on a screen but a virtual im.....
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"When an object is placed at a distance of 36 cm from a convex lens, an imag.....
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(a) An object 2 cm tall stands on the principal axis of a converging lens o.....
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a) An object 3 cm high is placed 24 cm away from a convex lens of focal le.....
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(a) Find the nature, position and magnification of the images formed by a c.....
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A convex lens produces a magnification of + 5. The object is placed
(a) at .....
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In order to obtain a magnification of, –3 (minus 3) with a convex lens, the.....
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If a magnification of, –1 (minus 1) is obtained by using a converging lens,.....
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To obtain a magnification of, –0.5 with a convex lens, the object should be.....
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A magnifying lens has a focal length of 100 mm. An object whose size is 16 .....
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Copy and complete the diagram below to show what happens to the rays of lig.....
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An object lies at a distance of 2f from a concave lens of focal length f. D.....
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Take down this figure into your answer book and complete the path of the ra.....
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Show by drawing a ray-diagram that the image of an object formed by a conca.....
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(a) An object is placed 10 cm from a lens of focal length 5 cm. Draw the ra.....
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A beam of parallel light rays is incident through the holes on one side of .....
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(a) Construct ray diagrams to illustrate the formation of a virtual image u.....
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A beam of light is incident through the holes on one side of a box and emer.....
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When an object is placed 10 cm in front of lens A, the image is real, inver.....
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Mean of 8 observations is 25 if one observation 11 is excluded find the mea.....
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(a) Find the position and size of the virtual image formed when an object 2.....
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A 50 cm tall object is at a very large distance from a diverging lens. A vi.....
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