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PUNJAB BOARD PREVIOUS YEAR PAPERS-Refraction of Light and Lenses-EXERCISE
- A 2.0 cm long needle is placed vertically at a distance 48 cm in front...
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- A 3.0 cm long needle is placed vertically at a distance 50 cm in front...
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- A 5.0 cm long needle is placed vertically at a distance 20 cm in front...
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- A ray of light of frequency of 5 x 10^14 Hz is passed through a liquid...
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- A ray of monochromatic light travelling in vacuum with speed C, wavele...
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- For the same angle of incidence, the angle of refraction in three diff...
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- Two lenses, one diverging of power 2D and the other converging of powe...
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- The radii of curvature of the faces of a double convex lens are 20 cm ...
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- A convex lens has 10 cm focal length in air.What is its focal length i...
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- If the critical angle for total internal reflection from medium to vac...
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- The radii of curvature of the faces of a double convex lens are 20 cm ...
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- A convex lens has 12 cm focal length in air. What is its focal length ...
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- The radii of curvature of the faces of a double convex lens are 10 cm ...
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- A convex lens has 20 cm focal length in air.What is its focal length i...
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- A concave lens is placed in contact with a convex lens of focal length...
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- A convex lens has 10 cm focal length in air.What is its focal length i...
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- A concave lens is kept in contact with convex lens of focal length 20 ...
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- A convex lens is made of glass of refractive index 1.5. If radius of c...
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- A needle placed 45cm from a lens forms an image on the screen placed 9...
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- A lens of focal length 12 cm produces a virtual image. The size of ima...
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