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A light of wavelength lambda is incident...

A light of wavelength `lambda` is incident on an object of size b. If a screen is at a distance D from the object. Identify the correct condition for the observation of different phenomenon
a) if `b^(2)=D lambda`, Fresnel diffraction is observed
b) if `b^(2)gtgtD lambda`, Fraunhoffer diffeaction is observed
c) `b^(2)ltltD lambda`, Fraunhoffer diffraction is observed
d) `b^(2)gtgtD almbad`, the approximation of geometrical optics is applicable

A

a,b and d are true

B

a,c and d are true

C

a and c are true

D

a and d are true

Text Solution

Verified by Experts

The correct Answer is:
B
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