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NEET UG PHYSICS MCQ: WAVE OPTICS

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Application +4 | -1

A slit of width ‘a’ is illuminated by white light. For red light

\left( {\lambda = 6500\,{A^ \circ }} \right)

, the first minima is obtained at

\left( {\lambda = 6500\,{A^ \circ }} \right)

, then the value of ‘a’ will be

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Correct option: C

1.24 microns

Option C (1.24 microns) is correct because it is the calculated width of the slit using the single-slit diffraction formula for the first minima.

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