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PUNJAB BOARD PREVIOUS YEAR PAPERS-Refraction of Light and Lenses-EXERCISE
- 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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- The image formed by the lens is erect and its length is three times th...
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- A lens placed at a distance of 20 cm from an object produces a virtual...
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- A needle placed 40 cm from a lens forms an image on a screen placed 80...
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- What is the focal lengthof the combination of a convex lens of focal l...
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- An object of size 5 cm is placed at distance of 25 cm in front of a co...
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- An object of size 10 cm is placed at distance of 20 cm in front of aco...
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- Two lenses of powers+15D and -5D are in contact with each other. What ...
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