Question

If speed of light decreased by 25 percent when light enter in a medium from air then what is its refractive index

Answer 1

Answer:

c= 3×10^8 m/s

v=300000000-1/4×300000000

=300000000-75000000

=225000000 m/s

refractive index= c/v

=300000000/225000000

=300/225

=60/45

=12/9

=4/3

=1.33