When a light ray enters into glass medium from water at an angle of incidence 0°, what would be the angle of refraction?

If a ray of light enters from a rarer medium to a denser medium at zero angle of incidence, it would

Refraction of light, as it enters from one transparent medium to another, is due to

When a ray of light travels from a denser medium to a rarer medium then

When a light ray passes through from air to water with a non-zero angle the ray will be

If the speed of light in air is represented by c and the speed in a medium is v, then the refractive index of the medium can be calculated using the formula