The speed decreases.
When light passes from air to glass, it undergoes refraction, which is the bending of the light ray due to the change in speed as it moves from one medium to another. The speed of light is slower in glass compared to air, causing the light ray to bend towards the normal.
When light passes through a glass block, it undergoes refraction, which is the bending of light as it enters the glass and again as it exits. The speed of light changes as it moves from air to glass, causing the light rays to change direction.
It moves at a slower speed!
When light enters a glass block, it changes speed and bends due to refraction, causing the light beam to deviate from its original path. The light exits the glass block at a different angle than it entered. This phenomenon is a result of the change in the speed of light as it passes from air into the denser medium of the glass.
Light bends when it passes from air into a glass slab due to the change in speed of light as it travels through different mediums. This change in speed causes the light to refract, or change direction, at the boundary between the air and the glass slab due to the difference in optical density between the two mediums.
When light passes through glass, its speed decreases and it bends, or refracts, due to the change in the medium.
It increases.
it travels at c (speed of light in a vacuum)
When light passes from water to glass, it changes speed and direction due to the difference in refractive indexes between the two mediums. When it passes from glass to air, the light again changes speed and direction, leading to refraction and possible reflection at the interface. The bending of light at each interface is determined by Snell's Law, which relates the angle of incidence and refractive indexes of the two mediums.
The speed of light is constant and does not change based on the material it passes through. However, when light enters a medium such as glass or water, its speed decreases due to interactions with the atoms in the material.
When light passes from air to glass, it changes speed and direction due to the difference in the density of the two materials. This causes the light to bend or refract, as shown in the image.
Light travels slower in glass based on its refractive index of 1.5.