light phenomena

reflection

100

What is the Law of Reflection?

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

200

What is a concave lens?

This lens spreads light rays apart.

300

^{What is a convex lense?}

This lens is thicker in the middle.

refraction

100

^{What is refraction?}

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

200

^{What is toward the normal?}

When light enters water from air, it bends toward or away from the normal?

300

^{What is bending (direction)?}

When light goes from air into water, it changes this direction.

total internal reflection

100

^{What is total internal reflection?}

This happens when light reflects and does NOT pass through.

200

^{What is the critical angle?}

The smallest angle needed for total internal reflection is called this.

300

^{What is reflect back inside?}

When the angle of incidence is greater than the critical angle, light does this.

lenses

100

What is a convex (converging) lens?

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

200

^{What is a concave (diverging) lens?}

This type of lens always produces virtual, upright, smaller images.

300

^{What is the focal length?}

The distance from the center of a lens to its focal point is called this.