A monochromatic light of wavelength 6000 Å is incident on a single slit of width 0.01 mm. If the diffraction pattern is formed at the focus of a convex lens of focal length 20 cm, the linear width of the central maximum is:
Options

Question

A monochromatic light of wavelength 6000 Å is incident on a single slit of width 0.01 mm. If the diffraction pattern is formed at the focus of a convex lens of focal length 20 cm, the linear width of the central maximum is:

Options

G1 Physics · Accepted Answer

For single-slit diffraction, central maximum width at focal plane: W = 2fλ/a = [2 × 0.2 × 6000 × 10⁻¹⁰]/(0.01 × 10⁻³) = 2.4 × 10⁻² m = 24 mm