When a light ray is incident normal to the interface between any two media what will be the angle of refraction?

When a light ray is incident normal to the interface between two media, it travels straight into the second medium without bending. This is because the angle of incidence is 0 degrees. According to Snell's law, since the sine of 0 degrees is 0, the angle of refraction will also be 0 degrees, meaning the light continues in the same direction.