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When both the listener and source are mo...

When both the listener and source are moving towards each other, then which of the following is true regarding frequency and wavelength of wave observed by the observer?

A

More frequency, less wavelength

B

More frequency, more wavelength

C

Less frequency, less wavelength

D

More frequency, constant wavelength

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • When both the listener and source are moving towards each other, then which of the following is true regarding frequency and wavelength of wave obserseved by the observer?

    A
    More frequency, less wavelength
    B
    More frequency, more wavelength
    C
    Less frequency , less wavelength
    D
    More frequency, constant wavelength

  • 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

  • An observer moves towards a stationary source of sound with a speed ((1)/(5)) th of the speed of sound. The wavelength and frequency of the source emitted are lamda and f, respectively. The apparent frequency and wavelength recorded by the observer are, respectively.

    A
    `1.2f` and `lamda`
    B
    `f` and `1.2lamda`
    C
    `0.8` and `0.8lamda`
    D
    `1.2f` and `1.2lamda`

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