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Which of the following generates a plane...

Which of the following generates a plane wavefront?

A

`alpha-"rays"`

B

`beta-"rays"`

C

`gamma-"rays"`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
When the point source or linear source of light is at very large distance, a small portion of spherical or cylindrical wavefront appears to be plane, such a wavefront is called a plane wavefront.

In the given options, none of sources generates plane wavefront, it can be artificially produced by reflection from a mirror or by refraction through a lens.
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Knowledge Check

  • Which of the following produces a plane wavefront ?

    A
    Point source
    B
    Line source
    C
    Extended source
    D
    None of these

  • Light waves travel in vacuum along the y-axis. Which of the following may represent the wavefront?

    A
    x = constant
    B
    y = constant
    C
    z = constant
    D
    `x + y + z` = constant

  • Light wave is travelling along X-axis in a medium. Which of the following can represent wavefront for this light wave ?

    A
    `x = 0`
    B
    `x = c`
    C
    `x^2 + y^2 + z^2 = c^2`
    D
    `z = c`

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    A light wave is travelling along - Y direction. For this light wave, which of the following equations of planes may represent its wavefront.

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    Which of the following phenomenon is not explanined by Huygen's construction of wavefront ?

    Which one of the following phenomena is not explained by Huygen’s construction of wavefront?

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