Physics · PYQ NEET UG 2022

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

1. A
   \( 9 \)
2. B
   \( 12 \)
3. C
   \( 6 \)
4. D
   \( 8 \)