First slide

Diffraction

Question

What will be the angular width of central maxima in frunhofer diffraction when light of wavelength 6000 Å is used and slit width is $12 \times 10^{- 5} cm ?$

Moderate

A

3 rad
B

8 rad
C

2 rad
D

1 rad

Solution

$ω_{0} = \frac{2 λ}{a}$
$ω_{0} = \frac{2 \times 6000 \times 10^{- 10} (m)}{12 \times 10^{- 7} (m)}$
$ω_{0} = 1 rad$

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