First slide

Diffraction of light-Wave Optics

Question

What will be the angular width of central maxima in Fraunhoffer diffraction when light of wavelength $6000 \overset{o}{A}$ is used and slit width is $12 \times 10^{- 5} cm$ .

Moderate

A

2 rad
B

3 rad
C

1 rad
D

8 rad

Solution

$Angular width = \frac{2 λ}{d} = \frac{2 \times 6000 \times 10^{- 10}}{12 \times 10^{- 5} \times 10^{- 2}} = 1 rad .$

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