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JEE Main
IMPORTANT
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When light is refracted into a medium,

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Important Questions on Light Waves

EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 6
When light is refracted, which of the following does not change?
HARD
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 7
An amplitude modulated (AM) radio wave bends appreciably round the corners of a 1 m×1 m board, but the frequency modulated (FM) wave only negligibly bends. If the average wavelengths of AM and FM waves are λa and λf,
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 8
Which of the following sources give the best monochromatic light?
HARD
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 9
The wavefronts of a light wave travelling in vacuum are given by x+y+z=c. The angle made by the direction of propagation of light with the x-axis is
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 10
The wavefronts of light coming from a distant source of unknown shape are nearly
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 11
The inverse square law of intensity (i.e., the intensity∝1r2) is valid for a
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 12
Two sources are called coherent if they produce waves
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 13
When a drop of oil is spread on a water surface, it displays beautiful colours in daylight because of