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Find the right condition(s) for Fraunhof...

Find the right condition(s) for Fraunhofer diffraction due to a single slit

A

Source is at infinite distance and the incident beam has coverged at the slit

B

Source is near to the slit and the incident beam is parallel

C

Source is at infinity and the incident beam is parallel

D

Source is near to the slit and the incident beam has coverged at the slit

Text Solution

Verified by Experts

The correct Answer is:
C
The source is at infinity and incident beam is parallel
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Knowledge Check

  • For Fraunhofer diffraction to occur

    A
    light source should be at infinity.
    B
    both source and screen should be at infinity.
    C
    only the source should be at finite distance
    D
    both source and screen should be at finite distance

  • The condition for observing Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be

    A
    Spherical
    B
    Cylindrical
    C
    Plane
    D
    Elliptical

  • Direction of the first secondary maximum in the Fraunhofer diffraction pattern at a single slit is given by (a is the width of the slit)

    A
    (a) `asin theta=lambda/2`
    B
    (b) `a cos theta=(3lambda)/(2)`
    C
    (c) `asin theta=lambda`
    D
    (d) `a sin theta=(3lambda)/(2)`

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