Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2008PhysicsWave OpticsActual

Interference was observed in an interference chamber when air was present. Now, the chamber is evacuated and if the same light is used, a careful observation will show

Options

  1. Ano interference
  2. Binterference with bright band
  3. Cinterference with dark bands
  4. Dinterference in which breadth of the fringe will be slightly increased

Correct answer

D. interference in which breadth of the fringe will be slightly increased

Step-by-step solution

When chamber is evacuated, the refractive index ( ) decreases. Therefore, wavelength ( 1 ) increases. Now, fringe width is given by aligned & = D d & aligned Therefore, as wavelength increases, the fringe width will increase.

Practice Wave Optics on Quantrex Academy →

More from Wave Optics

An unpolarized light beam of intensity I₀ passes through a series of n Polaroids P₁, P₂, P₃, P_n . The pass axis of each poloroid makes an angle of 60^ with the other poloroid. Wha 2026In a single-slit Fraunhofer diffraction experiment, the first secondary minimum is observed at an angle of 30^ for light of wavelength . If the same slit is now illuminated by ligh 2026In the Young's double slit experiment, the intensity of light at a point on the screen is 'K', being the wavelength of light used. The intensity at a point where path difference is 2026Two images are considered "just resolved" according to Rayleigh's criterion when 2026In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths ₁ = 6000 Å and ₂ = 5000 Å one after the other. At what minimum distanc 2026In Young's double slit, 18 fringes are observed to be formed in a certain segment of the screen when light of wavelength 400 nm is used. If the wavelength is changed to 600 nm, the 2026When the un-polarised light beam is incident from air to glass (n = 1.5) at the Brewster's angle, 2026In Young's double-slit experiment, the intensity at a point is ( 1 4 ) of the maximum intensity. The angular position of this point is = wavelength of light used, d = separation be 2026 Full Wave Optics list All NEET PYQs