NEET Physics Diffraction MCQ Question
A single slit of width a is illuminated by a monochromatic light of wavelength 600 nₘ. The value of 'a' for which first minimum appears at θ = 30° on the screen will be :
0.6 μm
2 μm
8 μm
3 μm
Correct Answer
Detailed Explanation
Using the single-slit diffraction formula for the first minimum, a sin θ = mλ, where m = 1, the width a is calculated.
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