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If a source of light is moving away from...

If a source of light is moving away from a stationary observer, then the frequency of light wave appears to change because of

A

Doppler's effect

B

interference

C

diffraction

D

None of these

Text Solution

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The correct Answer is:
A
According to Doppler's effect, wherever there is a relative motion between source and observer, the frequency observed is different from that given out by source. So, we should be careful in constructing the wavefronts if the source (or the observer) is moving.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE THEORY OF LIGHT -EXERCISE 1
  1. In given figure, light passes from denser medium 1 to rarer medium 2. ...

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  2. Figure shows behaviour of a wavefront when it passes through a prism. ...

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  3. If a source of light is moving away from a stationary observer, then t...

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  4. If a star is moving towards the earth, then the lines are shifted towa...

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  5. It is believed that the universe is expanding and hence the distant st...

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  6. In case of reflection of a wavefront from a reflecting surface, I...

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  7. If AB is incident wavefront, then refracted wavefront is

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  8. In the context of Doppler effect in light, the term red shift signifie...

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  9. If source and observer are moving towards each other with a velocity v...

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  10. Monochromatic light of wavelength 589nm is incident from air on a wate...

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  11. The critical angle of a certain medium is sin ^(-1)((3)/(5)). The pola...

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  12. When the angle of incidence on a material is 60^(@), the reflected lig...

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  13. Two Nicols are oriented with their principal planes making an angle of...

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  14. Which of the following is a dichroic crysral?

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  15. The graph showing the dependence of intensity of transmitted light on ...

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  16. Sound wave in air cannot be polarised because

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  17. In case of linearly polarised light, the magnitude of the electric fie...

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  18. Which of the following statement(s) is/are correct? I. A polaroid co...

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  19. Polaroids are used in

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  20. Figure shows the process of

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