As per the question,
Wavelength of the plane wave (λ)=500A∘=500×10−10m(\lambda)=500 A^\circ =500\times 10^{-10}m(λ)=500A∘=500×10−10m
Width of the slit =0.5mm=5×10−4m=0.5 mm = 5\times 10^{-4}m=0.5mm=5×10−4m
Angle of diffraction = ?
θ=λw\theta =\frac{\lambda}{w}θ=wλ
θ=500×10−10m5×10−4m=1×10−4radian\theta = \frac{500 \times 10^{-10}m}{5\times 10^{-4}m} =1\times 10^{-4} radianθ=5×10−4m500×10−10m=1×10−4radian
similarly,
θ′=500×10−10m1×10−4m=5×10−4radian\theta' = \frac{500 \times 10^{-10}m}{1\times 10^{-4}m} =5\times 10^{-4} radianθ′=1×10−4m500×10−10m=5×10−4radian
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