Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK202510 May 2025Evening ShiftPhysicsWave OpticsActual

An EM wave of frequency 8 10¹⁰ Hz falls normally on a rectangular slit of width 3 cm . What is the total angular width of the central maxima?

Options

  1. A4 rad
  2. B8 rad
  3. C0.25 rad
  4. D2 rad

Correct answer

C. 0.25 rad

Step-by-step solution

Wavelength: = c = 3 10^8 8 10¹⁰ = 0.375 10⁻² m = 0.375 cm First minimum condition: = a = 0.375 3 = 0.125 Since 0.125 is small, 0.125 rad Total angular width of central maximum = 2 = 2 0.125 = 0.25 rad

Practice Wave Optics on Quantrex Academy →

More from Wave Optics

If the intensity of the central maximum in the Young's double slit experiment is I₀ , what will be the intensity at the same region when one of the slits is blocked by an opaque ob 2026The width of the fringes obtained with a light of wave length 6.2 10⁻⁸ m is 1.82 mm. If the whole apparatus is immersed in a liquid of refractive index 1.3, what will be the width 2026In a single slit diffraction experiment, the diffraction pattern is observed on a screen placed at a distance of 2m from the slit of 1mm width. If the distance between the first da 2026A diffraction pattern due to a single slit of width 0.12mm is obtained with a blue green light of wavelength 500 nm. The angular separation between central maximum and second order 2026In a Young's double slit experiment, the slit separation is 1.5 mm. The setup is illuminated simultaneously by light of wavelengths 6000 Å and 8000 Å. The screen is placed at a dis 2026In a Young's double slit experiment, the slits are separated by 0.5 mm. Fringes are obtained on a screen which is placed at distance 1 m away from the slits. When the screen is mov 2026In Young's double slit experiment, how many maxima can be seen on a screen (including central maxima) if d = 5 2 (where is wavelength of light and d is distance between the two sli 2026In an experiment, two polariods are arranged such that the intensity of the polarised light emerged from the second polaroid is 37.5 % of the intensity of the unpolarised light inc 2025 Full Wave Optics list All COMEDK PYQs