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What is understood by diffraction of lig...

What is understood by diffraction of light? In a single slit experiment, if the width of the slit increases, what will be the change of angular width of the central maxima? State Brewster's law.

Text Solution

Verified by Experts

We know , `2theta = (2lambda)/(a) `
The angular width `(2theta)` of the central maximum decreases in the same ratio at which the width a of the slit increases.
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Knowledge Check

  • If width of the slit is increased, what changes would be there in linear width of central maximum?

    A
    increases
    B
    decreases
    C
    remains unchanged
    D
    none of the above

  • In a single slit experiment, the width of the slit is reduced. The linear width of the central maximum

    A
    will increase but intensity will be reduced
    B
    will decrease but intensity will be increased more
    C
    will increase but intensity will be increased more
    D
    will decrease but intensity will be reduced

  • In a single slit experiment, the width of the slit is reduced to half. To keep the width of central maximum same, what is to be done of the following?

    A
    the distance between the slit and the screen is to be reduced to half
    B
    the distance between the slit and the screen is to be reduced to one-fourth
    C
    the distance between the slit and the screen is to be doubled
    D
    nothing to be done, as width of centra maximum does not depend upon the width of the slit

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