JEE PHYSICS MCQ: WAVE OPTICS

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Application +4 | -1

Plane wave front is incident on a single slit of width

0.2 \mathrm{~mm}

by which Fraunhoffer diffraction pattern is formed by lens of focal length

1 \mathrm{~m}

. If the second minima is formed at a distance of

3 \mathrm{~mm}

from the centre then find the wavelength of light.

View answer and explanation

Correct option: B

3000 ~\mathop {\text{A}}\limits^ \circ

Option B (

3000 ~\mathop {\text{A}}\limits^ \circ

) is correct because it is the wavelength calculated using the formula for the position of minima in Fraunhofer diffraction.

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