Light

Reflection

100

This law states that the angle of incidence equals the angle of reflection.

 Law of Reflection

200

This imaginary line is drawn perpendicular to a surface to measure angles.

The normal

300

This type of reflection occurs on rough surfaces and scatters light.

diffuse reflection

Refraction

100

This is the bending of light when it passes from one medium to another.

refraction

200

Light bends toward the normal when it moves into a medium where it becomes this.

It is slower

300

This equation relates refractive index to the speed of light.

What is n = c / v

TIR

100

TIR only happens when light travels from a higher refractive index medium to a lower one, like this to this.

Glass to air

200

This special angle must be exceeded for TIR to occur.

critical angle

300

At the critical angle, the refracted ray travels along this.

the boundary/surface

Lenses

100

This type of lens converges parallel light rays to a focal point.

convex (converging) lens

200

This type of lens spreads light rays apart.

concave (diverging) lens

300

This point is where parallel rays meet after passing through a converging lens.

The focal point