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When the light source is moving towards ...

When the light source is moving towards an observer,

A

wavelength of light decreases.

B

wavelength of light increases.

C

wavelength of light remains unchanged

D

velocity of light increases

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The correct Answer is:
A
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TARGET PUBLICATION-WAVE THEORY OF LIGHT -EVALUATION TEST
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  4. Unpolarised light of internsity 32 Wm^(-2) passes through three polari...

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  6. A beam of unpolarised light having flux 10^(-2) watt falls normally on...

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  7. Assertion : If light is polarised by reflection, then the angle betwee...

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  8. The speactral line emitted by a star, has a wavelength of 6800 Å when ...

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  9. A cylindrical wavefront spreads form a line source which is comparable...

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  10. A lens of focal length f gives diffraction pattern of Fraunhoffer type...

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  11. A parallel beam of monochromatic light is incident on a glass slab at ...

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  12. For passage of monochromatic beam of light in a medium of refractive i...

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  13. Velocity of light in deamond is (2/5)^(th) that in air. Velocity of l...

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  14. For navigatio purpose, in polar regions

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  15. When a plane wavefront is incident on a double convex lens, the refrac...

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  16. As a spherical wavefront propagates, the amplitude (a) of a spherical ...

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  17. Assertion: Speed of light in glass is indep[endent of the colour of l...

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  18. Assertion : Stars are often photographed with the help of telescope fi...

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  19. Assertion : If theta is the angle between the planes of transmission ...

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  20. Ordinary light incident on a glass slab at the polarising angle suffer...

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  21. A mixture of plane polarised and unpolarised light falls normally on a...

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