Question

Monochromatic light of frequency 5 x 104 Hz traveling in vacuum enters a medium of refractive
index 15 is wavelength in medium will be
(1) 5500 A
2) 6000 A
3) 4000 A
4) 5000 A
​

Answer 1

Velocity of light =3×10

8

m/s

Wavelength 1=3×10

8

m/s÷5×10

1

4m/s=6000 angstrom.

N

2

÷n

1

=6000 angstrom ÷ wavelength

2=1.5÷1=6000 angstrom ÷ wavelength 2=4000 angstrom.

Hence, Option C is correct

please please mark as brainlist please