Physics MCQs

Page No. 60

Which experiment shows that wavelength of light is smaller than that of sound___________________?


aDiffraction

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b Polarization

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cInterference

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dReflection

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View Answer Diffraction

Gives the definition of metre in terms of wavelength of red cadmium light ___________________?


aNewton

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bEinstein

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cMichelson

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dGalileo

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View Answer Michelson

A thing that emits its own light is___________________?


aluminous

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bnon-luminous

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c incandescent

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dbright

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View Answer luminous

Diffraction fringes are____________________?


aequally spaced

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bdistance between them increases

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cdistance between then decreases

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dthey are adjacent with no space in between

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A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________?


a500 mm

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b5 x 10-3 mm

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c2 x 10-5 mm

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d2 x 10-3 mm

✓


View Answer 2 x 10-3 mm

Diffraction effect is____________________?


amore for a round edge

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bless for a round edge

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cmore for a sharp edge

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dless for a sharp edge

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View Answer more for a sharp edge

A light ray traveling form rarer to denser medium suffers a phase change of__________________?


a60°

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b90°

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c180°

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d45°

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View Answer 180°

appearance of colour in thin films is due to ____________________?


adiffraction

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bdispersion

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c interference

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dpolarization

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View Answer interference

The velocity of light was determined accurately by_______________?


aNewton

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bMichelson

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cHuygen

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dYoung

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View Answer Michelson

Two sources of light are coherent if they emit rays of_______________?


asame wavelength

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bsame amplitude of vibration

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csame wave length with constant phase difference

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dsame amplitude and wavelength

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