EASY
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IMPORTANT
Earn 100
Explain how an air bubble in water behaves as a diverging lens.
Important Questions on Ray Optics and Optical Instruments
EASY
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IMPORTANT
A distance separates two thin convex lenses of focal lengths and For what value of a parallel beam of light falling on this combination parallel to the common principal axis emerges out of the combination as a parallel beam ?
EASY
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IMPORTANT
Show that for a thin prism the deviation is given by
EASY
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IMPORTANT
Draw the ray diagram for formation of primary rainbow.
EASY
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IMPORTANT
A bi-convex lens has a focal length equal to half the radius of curvature of either surface. What is the index of refraction of the lens material ?
EASY
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IMPORTANT
A ray of light enters a liquid and a bent towards the normal as shown. Calculate the speed of light in the liquid.
MEDIUM
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IMPORTANT
If the absolute refractive index of glass is and water is Find the ratio of focal lengths of a glass lens when in water and when in air.
MEDIUM
NEET
IMPORTANT
A ray of light is incident on a glass sphere at an angle of incidence Show that angle of emergence is
EASY
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IMPORTANT
Write lens maker's formula and describe the symbols used in it.
