MEDIUM
Earn 100

Non-luminous objects _____.
(a)Give light of their own
(b)Do not give light of their own
(c)Give heat of their own
(d)None of these

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Important Questions on Light, Shadows and Reflections
MEDIUM

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What do you understand by monochromatic light and polychromatic light?

HARD

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Name the portion of the electromagnetic spectrum in between ultraviolet and infrared regions.

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The following graph depicts the inverse of magnification versus the distance between the object and lens data for a setup. The focal length of the lens used in the setup is
Distance between the object and the lens

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How fast would a rocket have to go relative to an observer for its length to be corrected to of its length at rest?

EASY
The radii of curvature of the faces of a double convex lens made of glass, are and . Its focal length is .
Find the refractive index of glass
Calculate its new focal length if the lens is completely immersed in water ( Refractive index of water is )

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MEDIUM

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