COMPASSLearning
RegisterLogin

JEE Main · 2025 · 08 Apr 2025 · Shift 2 · Wave Optics

WhatsApp Email
In a Young's double slit experiment, the source is white light. One of the slits is covered by red filter and another by a green filter. In this case
  1. (A)There shall be an interference pattern for red distinct from that for green.
  2. (B)There shall be no interference fringes.✓ Correct
  3. (C)There shall be alternate interference fringes of red and green.
  4. (D)There shall be an interference pattern, where each fringe's pattern center is green and outer edges is red.

Answer: (B)

Solution

Interference requires two coherent sources, meaning the same frequency with a steady phase relationship. Placing a red filter over one slit and a green filter over the other sends light of different wavelengths and frequencies through the two slits, so the beams are mutually incoherent and no fixed phase relation exists between them. Consequently no stable fringe system can build up. There shall be no interference fringes.

JEE Main · 2025 · 08 Apr 2025 · Shift 2 · Single correct option

Practise more: all JEE Main PYQs on Wave Optics →

More JEE Main questions on Wave Optics

  1. Given below are two statements:
    Statement I: In a Young's double slit experiment, the angular separation of fringes will increase as the screen is moved away from the plane of the slits
    Statement II : In a Young's double slit experiment, the angular separation of fringes will inc …
    JEE Main 2026View solution →
  2. In a Young's double slit experiment set up, the two slits are kept 0.4 mm apart and screen is placed at 1 m from slits. If a thin transparent sheet of thickness is introduced in front of one of the slits then centre bring fringe shifts by 20 mm on the screen …
    JEE Main 2026View solution →
  3. In two separate Young's double-slit experimental set-ups, two monochromatic light sources of different wavelengths are used to get fringes of equal width. The ratios of the slit separations and that of the wavelengths of light used are and respectively. The correspo …
    JEE Main 2026View solution →
  4. When an unpolarized light falls at a particular angle on a glass plate (placed in air), it is observed that the reflected beam is linearly polarized. The angle of refracted beam with respect to the normal is .
    (, refractive indices of air a …
    JEE Main 2026View solution →
  5. Given below are two statements:

    Statement-I: A plane wave after passing through prism remains as plane wave but passing through small pin hole may become spherical wave.
    Statement-II: The curvature of a spherical wave emerging from a slit will increase for increasing slit width. …
    JEE Main 2026View solution →
  6. In the Young's double slit experiment the intensity produced by each one of the individual slits is . The distance between two slits is 2 mm. The distance of screen from slits is 10 m. The wavelength of light is . The intensity of light on the screen in front of …
    JEE Main 2026View solution →