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Estimate Fresnel distance for slit of size 1 cm for wavelength 500nm

Estimate Fresnel distance for slit of size 1 cm for wavelength 500nm

Grade:12

1 Answers

Arun
25763 Points
3 years ago
Fresnel’s distance (ZF) is the distance for which the ray optics is a good approximation. It is given by the relation,
Zf = a²/lambda = 1*10^-2 *1*10^-2 /500*10^-9
= 10^-4/5*10^-7
= 1000/5 = 200 m
 
Regards
Arun (askIITians forum expert)

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