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Wave Optics Test - 37
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Wave Optics Test - 37
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  • Question 1/10
    4 / -1
    A rocket is moving away from the earth at a speed of 6 × 107 m/s. The rocket has blue light in it. What will be the wavelength of light recorded by an observer on the earth? (wavelength of blue light = 4600 Å)
    Solutions

  • Question 2/10
    4 / -1
    A spectral line λ = 5000 Å in the light coming from a distant star is observed as a 5200 Å. What will be recession velocity of the star?
    Solutions

  • Question 3/10
    4 / -1
    Three observes A, B and C measure the speed of light coming from a source to be vA, vB and v C. The observer A moves towards the source, the observer C moves away from the source with the same speed. The observer B stays stationary. The surrounding space is vacuum every where. Then
  • Question 4/10
    4 / -1
    The velocity of light emitted by a source S observed by an observer O, who is at rest with respect to S is c. If the observer moves towards S with velocity v, the velocity of light as observed will be
  • Question 5/10
    4 / -1
    In the context of Doppler effect in light, the term \'red shift\' signifies
  • Question 6/10
    4 / -1
    The sun is rotating about its own axis. The spectral lines emitted from the two ends of its equator, for an observer on the earth, will show
  • Question 7/10
    4 / -1
    A star is moving away from the earth with a velocity of 100 km/s. If the velocity of light is 3 × 108m/s then the shift of its spectral line of wavelength 5700 Å due to Doppler\'s effect will be
    Solutions

  • Question 8/10
    4 / -1
    If a source of light is moving away from a stationary observer, then the frequency of light wave appears to change because of
  • Question 9/10
    4 / -1
    A star emitting radiation at a wavelength of 5000 Å is approaching earth with a velocity of 1.5 × 106 m/s. The change in wavelength of the radiation as received on the earth, is
    Solutions

  • Question 10/10
    4 / -1
    A star emitting light of wavelength 5896 Å is moving away from the earth with a speed of 3600 km/s. The wavelength of light observed on earth will
    (c = 3 x 108 m/s is the speed of light)
    Solutions

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