Physics Circle home Student Login

Home›Chapters›Wave Optics PYQs›Diffraction at a Single Slit›Question 35

JEE Main 2024 (1 Feb, Shift 1) · Diffraction at a Single Slit

Diffraction at a Single Slit question from JEE Main 2024 (1 Feb, Shift 1)

Q35JEE Main 2024 · 1 FEB · SHIFT 1Medium

Diffraction at a Single Slit

A monochromatic light of wavelength 6000 A˚6000\text{ \AA} is incident on the single slit of width 0.01 mm0.01\text{ mm}. If the diffraction pattern is formed at the focus of the convex lens of focal length 20 cm20\text{ cm}, the linear width of the central maximum is:

Show answer and solution

Answer: (b)

  1. With the lens, screen distance =f= f: width =2λfa= \dfrac{2\lambda f}{a}
  2. =2×6×10−7×0.201×10−5=2.4×10−2= \dfrac{2 \times 6 \times 10^{-7} \times 0.20}{1 \times 10^{-5}} = 2.4 \times 10^{-2} m
  3. So the answer is (b) 2424 mm.
Report a mistake

More questions on Diffraction at a Single Slit