Khan Academy

What is friction? (K-A)

Two masses hanging from a pulley (K-A)

What is tension? (K-A)

Dispersion (K-A)

Refraction and Snell's law (K-A)

Refraction in water (K-A)

Snell's law example 1 (K-A)

Snell's law example 2 (K-A)

Convex parabolic mirrors (K-A)

Specular and diffuse reflection (K-A)

Derivation of the mirror equation (K-A)

Specular and diffuse reflection 2 (K-A)

Mirror equation example problems (K-A)

Total internal reflection (K-A)

Parabolic mirrors 2 (K-A)

Parabolic mirrors and real images (K-A)

Virtual image (K-A)

Concave lenses (K-A)

Bouncing fruit collision example (K-A)

Convex lens examples (K-A)

Newton's second law of motion (K-A)

Introduction to Momentum (K-A)

Convex lenses (K-A)

Diopters, Aberration, and the Human Eye (K-A)

Multiple lens systems (K-A)