Question

the speed of a light will be minimum while passing through​

Answer 1

$\huge\textrm{Answer :}$

Light travels at approximately 300,000 kilometers per second in a vacuum,

which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water and 200,000 kilometers per second in glass.

Answer 2

$\huge\rm{Answer:}$

Light travels at approximately 300,000 kilometers per second in a vacuum,

which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water and 200,000 kilometers per second in glass.