Question

Light travels with a velocity 0.8 x 108 m/s in
a medium. On entering a second medium,
its velocity becomes 0.45 x 108 m/s. What is
the refractive index of the second medium
with respect to the first medium?​

Answer 1

Answer:

$= 1.78$

Explanation:

by formula,

$2u1 = \frac{veocity \: in \: medium1}{velocity \: in \: medium \: 2}$

$= \frac{0.8 \times {10}^{8} }{0.45 \times {10}^{8} }$

$= 1.77777777.........$

$= 1.78$