Question

the refractive index of glass is 1.5 then what is the speed of light in glass​

Answer 1

Answer:

we know that,

n=C/v

given,

n=1.5

C=3×10^8

so,v=C/n

=3×10^8/1.5

=2×10^8

Explanation:

we know that speed of light in vaccum divided by velocity of light in a medium is equal to the refractive index of that medium i.e. n=C/v

Answer 2

Explanation:

$\Large{\red{\underline{\underline{\tt{\pink{Answer:}}}}}}$

 ‎ ‎ ‎ ‎ ‎ ‎ ‎

$\sf Refractive\:index\:of\:glass\:,\, \mu\:=\:1.5$

 ‎ ‎ ‎ ‎ ‎ ‎

$\sf Speed\:of\:light\:,\,c\:=\:3\times 10^8\,ms^{-1}$

 ‎ ‎ ‎ ‎ ‎ ‎

$\sf Speed\:of\:light\:in\:vaccum\:is\:given\:by,$

 ‎ ‎ ‎ ‎ ‎ ‎

$\sf v\:=\: \dfrac{c}{\mu}$

 ‎ ‎ ‎ ‎ ‎ ‎

$\sf \:=\: \dfrac{^2\cancel{3}\times 10^8}{\cancel{1.5}_1}$

 ‎ ‎ ‎ ‎ ‎ ‎

$\sf \:=\:2\times 10^8ms^{-1}$

 ‎ ‎ ‎ ‎ ‎ ‎

Hence speed of light in glass is $\sf{\blue{2\times 10^8ms^{-1}}}$