Answer to Question #188082 in Quantum Mechanics for Priyanshu

Question #188082

The distance from earth surface to moon surface is 3.8x105 km. Calculate areal spread and angular spread for a laser of wavelength 632.8 nm and aperture 0.5 mm when it reaches moon.


1
Expert's answer
2021-05-03T10:29:00-0400

Angular Spread, θ=wavelength(λ)Aperture(a)=632.8×1090.5×103\theta=\dfrac{wavelength(\lambda)}{Aperture(a)}=\dfrac{632.8\times10^{-9}}{0.5\times10^{-3}}

θ=1265.6×106\theta=1265.6\times10^{-6}


Axial spread =d×θ=(3.8×105)×(1265.6×106)=480.928=d\times\theta=(3.8\times10^5)\times(1265.6\times10^{-6})=480.928


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