What is the diameter of the spot at the focal point

Reference no: EM13651366

Light of 600nm passes thrugh a circularaperture and is focused by a lens with a numerical apertureNA=0.1.

a) what is the diameter of the spot at the focal point?

b) Light of 400 nm passes through the same lens. Now, what isthe diameter of the spot? (This is partly why Blu-Ray players canread higher density information thatn DVDs).

Reference no: EM13651366

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