Question

86) In Young's double slit experiment, we get 15
fringes per cm on the screen, using light of
wavelength 5600 Å. For the same setting, how
many fringes per cm will be obtained with
light of wavelength 7000 Å ?
a) 10
b) 12
c) 15
d) 18​

Answer 1

Answer:

options c is right answer of this question ❤