its frequency remains constant but velocity changes.
The speed of light decreases when it travels from air into glass because the glass has a higher refractive index than air. This causes the light to slow down as it moves through the denser medium.
Water is denser than air . Hence light travels faster in air than water.
Correct.
The light refracts due to the change in speed. The change in speed occurs because the light is travelling through a denser medium. So it will travel fastest through the air and slowest through the glass
The speed of light in air is almost but not quite the same as its speed in vacuum,whereas its speed in water is about 25% less.So when light passes from air into water, its speed drops by about 25% .
When light rays travel from water into air, they undergo refraction. This causes the light rays to bend away from the normal (perpendicular) to the surface, causing the light to appear to change direction. This is due to the change in speed of light as it moves from a denser medium (water) to a less dense one (air).
Light travels slower in water than in air because when light enters the water medium, according to the collision theory, the particles of the water gets some of the light energy and displaces light from its real path. As the energy is absorbed, it is a fact that on decreasing the energy of anything, it will get much slower in performing that work. So light travels slower in water than in air.
Light slows down when it travels through a denser medium like glass or water compared to air. This change in speed causes the light to change direction, or refract, as it enters the denser medium. The amount of bending depends on the difference in speed between the two mediums.
The speed of light varies because the absolute speed of light "C" is measured in a vacuum. When light travels through air, it goes slightly slower. When light travels through denser mediums still, such as glass, the speed decreases further still.
Electromagnetic wave, namely, light as it travels through denser medium its speed decreases from its speed when it travels through air or vacuum.
The angle of refraction bends toward the normal when light travels from a less dense medium to a more dense medium, like from air to glass. This happens because the speed of light is slower in the denser medium, causing the light waves to refract towards the normal line.
Water- It is denser, and sound travels better through a denser substance.