1. Tardigrade
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  3. Physics
  4. A small aperture is illuminated with a parallel beam of λ = 628nm . The emergent beam has an angular divergence of 2° . The size of the aperture is.

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Q. A small aperture is illuminated with a parallel beam of $\lambda$ = 628nm . The emergent beam has an angular divergence of 2$^\circ$ . The size of the aperture is.

Wave Optics

Solution:

Correct answer is (b) $18\,\mu m$