Question

Ans the ques fast plzz!!!!!!!!!

Answer 1

Hey mate...
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Let , Velocity in second medium be x

We have,

n 21 =
$\frac{speed \: of \: light \: i n\: medium \: 1}{speed \: of \: light \: in \: medium 2\: }$


1.5 = 2 × 10^ 8 / x

Thus ...x = 1.3 × 10^ 8 m/s

Therefore,

Speed of light in medium 2 is 1.3 × 10^ 8 m/s

Also,

n 12 =
$\frac{speed \: of \: light \: in \: medium \: 2}{speedof \: light \: in \: medium \: 1}$

=
$\frac{1.3 \times 10 {}^{8} }{2 \times 10 {}^{8} }$

= 0.65

Ans..//