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A slit of width a is illuminated by red ...

A slit of width a is illuminated by red light of wavelength 650 nm. The first diffraction minimum is observed at an angle `theta_(1) = 5.2^(@)` from the direction of the incident beam.
The width of the slit a in mm is

A

`5.12xx10^(-3)`

B

`7.17xx10^(-3)`

C

`3.21 xx 10^(-7)`

D

`4.25 xx 10^(-7)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A slit of width a is illuminated by red light of wavelength 650 nm. The first diffraction minimum is observed at an angle theta_(1) = 5.2^(@) from the direction of the incident beam. The angle theta_(2) at which the second minimum is observed is

    A
    `10.4^(@)`
    B
    `8.6^(@)`
    C
    `7.5^(@)`
    D
    `9.5^(@)`

  • A narrow slit of 2 mm width is illuminated by a monochromatic light of wavelength 500 nm. What would be the intermediate distance between two first minima on either side of a screen kept 1m away?

    A
    5 mm
    B
    0.5 mm
    C
    1 mm
    D
    10 mm

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