EASY
JEE Main
IMPORTANT
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Which of the following sources give the best monochromatic light?

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Important Questions on Light Waves

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
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 14
Two coherent sources, of different intensities, send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio
MEDIUM
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 15
The slits in a Young's double slit experiment have equal width and the source is placed symmetrically with respect to the slits. The intensity at the central fringe is I0. If one of the slits is closed, the intensity at this point will be
EASY
JEE Main
IMPORTANT
CONCEPTS OF PHYSICS [VOLUME 1]>Chapter 17 - Light Waves>OBJECTIVE I>Q 16
A thin transparent sheet is placed in front of a Young's double slit. The fringe-width will