Light slows down when going through a medium. This is not to say that the speed of light, c, slows down. It doesn't - c remains constant - rather the light bounces randomly around the medium on its way to its destination, which increases the time it takes for the light to traverse through the medium.
When light travels through a medium, it travels in a straight line until it encounters a boundary between two different media, where it may refract, reflect, or scatter. The speed of light may change depending on the medium it is traveling through, which can affect its direction and intensity.
"air", "water" "glass" - generically a medium.
travels through a uniform medium
Light travels fastest through air, then glass, and slowest through water. The speed at which light travels through a medium depends on the refractive index of the material, with lower refractive indexes resulting in faster speeds.
Sound is a form of energy that travels "through" a mechanical medium. Light can be modelled as waves in certain circumstances. No mechanical medium is detectable, so either there is no medium, or the medium also propagates all matter the same way (Lorentz aether). The photoelectric effect shows that, just like sound is just motions of particles, so is light. electromagnetic
The speed of light is dependent on the medium it travels through. Light travels fastest in a vacuum than in water or air.
Light does that.
When light travels through a medium, it travels in a straight line until it encounters a boundary between two different media, where it may refract, reflect, or scatter. The speed of light may change depending on the medium it is traveling through, which can affect its direction and intensity.
Light travels through a vacuum, and through the densest metals (though not usually very far). But then gamma radiation and radio waves are examples of light...
travels through a uniform medium
"air", "water" "glass" - generically a medium.
travels through a uniform medium
The material through which a wave travels is called a medium.
floating
Light travels fastest through air, then glass, and slowest through water. The speed at which light travels through a medium depends on the refractive index of the material, with lower refractive indexes resulting in faster speeds.
Sound is a form of energy that travels "through" a mechanical medium. Light can be modelled as waves in certain circumstances. No mechanical medium is detectable, so either there is no medium, or the medium also propagates all matter the same way (Lorentz aether). The photoelectric effect shows that, just like sound is just motions of particles, so is light. electromagnetic
A wave travels through a medium as a disturbance. Waves can be mechanical (such as sound waves) or electromagnetic (such as light waves) and they transfer energy without transporting matter.