JEE Mains · Physics · STD 12 - 10. Wave optics
A monochromatic light of wavelength \(6000\)A is incident on the single slit of width \(0.01 \mathrm{~mm}\). If the diffraction pattern is formed at the focus of the convex lens of focal length \(20 \mathrm{~cm}\), the linear width of the central maximum is _______.
- A \(60 \mathrm{~mm}\)
- B \(24 \mathrm{~mm}\)
- C \(120 \mathrm{~mm}\)
- D \(12 \mathrm{~mm}\)
Answer & Solution
Correct Answer
(B) \(24 \mathrm{~mm}\)
Step-by-step Solution
Detailed explanation
Linear width \(\mathrm{W} =\frac{2 \lambda \mathrm{d}}{\mathrm{a}}=\frac{2 \times 6 \times 10^{-7} \times 0.2}{1 \times 10^{-5}}\) \(=2.4 \times 10^{-2}=24 \mathrm{~mm}\)
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