1. Tardigrade
  2. Question
  3. Physics
  4. In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of 600 nm wavelength is used. If the wavelength of light is changed to 400 nm, then the number of fringes he would observe in the same region of the screen is :

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. In a Young's double slit experiment, a student observes $8$ fringes in a certain segment of screen when a monochromatic light of $600 \,nm$ wavelength is used. If the wavelength of light is changed to $400\, nm$, then the number of fringes he would observe in the same region of the screen is :

NEETNEET 2022Wave Optics

Solution:

$y=(n \lambda)\left(\frac{D}{d}\right)$
$n _{1} \lambda_{1}= n _{2} \lambda_{2}$
$(8) (600 \,nm )= n _{2}(400)$
$n _{2}=12$