Question

the refractive index of glass is 1.5 calculate the speed of light in glass the speed of light in air is 3.0×10*ms-1​

Answer 1

Answer:

R.I.=speed of light in air/speed of light in medium

so,1.5=3.0*10^8/speed of light in glass

so, speed of light in glass=0.2*10^9m /s

Explanation:

0.2×10^9m/s

Hope it will help you Mark it brainlist. ...

Answer 2

we know that refractive index n =

$\red{ \mathtt{ \frac{speed \: \: of \: \: light \: \: in \: \: vaccum}{speed \: \: of \: \: light \: \: in \: \: medium}}}$

where c = 3 × 10^8 m/s

1.5 = c/v

$\mathtt{v = \frac{3 \times {10}^{8} }{1.5}} \\ \\ \mathtt{v = 2 \times {10}^{8}}$

For critical angle we will use snell's law

C is critical angle

$\mathtt{n_{glass} \sin(c) = n_{air} \sin(90)} \\ \\ \mathtt{n _{air} = 1} \\ \\ \\ \\ \mathtt{sin(c) = \frac{1}{n_{glass}} = \frac{1}{1.5}} \\ \\ \red{\mathtt{ c = 41.8°}}$

I hope it helps