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It is believed that the universe is expa...

It is believed that the universe is expanding and hence the distant stars are receding from us. Light from such a star will show

A

shift in frequency towards longer wavelengths

B

shift in frequency towards shorter wavelengths

C

no shift in frequency but decrease in intensity

D

a shift in frequency sometimes towards longer and sometimes towards shorter wavelengths

Text Solution

Verified by Experts

The correct Answer is:
A
As stars are moving away, the observed frequency will be slightly smaller than the emitted frequency. So, light observed is of longer wavelengths.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE THEORY OF LIGHT -EXERCISE 1
  1. If a source of light is moving away from a stationary observer, then t...

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

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

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

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

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

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

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

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

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

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

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  12. Which of the following is a dichroic crysral?

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

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  14. Sound wave in air cannot be polarised because

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

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

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  17. Polaroids are used in

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  18. Figure shows the process of

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  19. Which of the following statement(s) is/are correct with reference to t...

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  20. The Brewster angle for the glass air interface is 54.74^(@) if a ray o...

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