What is velocity of light in vaccum ?

What is vaccum ?

The absolute refractive index of water is 1.36. What is the velocity of light in water? (velocity of light in vacuum is 3×10^8m//s )

The absolute refractive index of water is 1.5. What is the velocity of light in water? (Velocity of light in vacuum = 3 xx 10^(8) m//s )

The absolute refractive index of water is 1.36. What is the velocity of light in water ? (Velocity of light in vacuum =3xx10^(8) m/s)

The velocity of light in vacuum is 3 xx 10^8 m//s . Therefore the velocity of light in m/s in a medium of R.I. 1.25 is

What is spectrum of light?

What is velocity of the wave ?

Show that the velocity of light in a rarer medium is greater than velocity in a denser medium.

What is velocity gradient ?