Reflection
What is reflection?
The bouncing back of light when it hits a surface.
What is refraction?
The bending of light as it passes from one medium to another.
What is total internal reflection?
The complete reflection of light inside a medium when it hits the boundary at a large angle.
What is a convex lens?
A lens that converges parallel light rays to a focal point.
What is the Law of Reflection?
The rule that states the angle of incidence equals the angle of reflection.
What causes refraction?
The change in speed of light when it enters a different medium.
What is the critical angle?
The minimum angle required for total internal reflection to occur.
What is a concave lens?
A lens that spreads light rays apart.
What is a plane mirror?
A smooth, shiny surface that produces a clear image.
What is air (or vacuum)?
The medium in which light travels the fastest.
What is light traveling from higher to lower refractive index?
The condition that light must travel from a denser to a less dense medium for total internal reflection to happen.
What is the focal point?
The point where parallel rays meet after passing through a converging lens.
What is diffuse reflection?
The type of reflection that occurs on rough surfaces and scatters light in many directions.
What is refractive index?
The measure of how much a material slows down light.
What are fiber optic cables?
Devices that use total internal reflection to transmit light signals.
What is focal length?
The distance from the center of a lens to the focal point.
What is the normal line?
The imaginary line drawn perpendicular to a surface at the point where light hits.
What is refraction?
The reason a straw appears bent in a glass of water.
What is total internal reflection?
The reason diamonds sparkle so much.
What is a real image?
An image that can be projected onto a screen.