Physics the study of matter, motion, energy, and force.

Light and the electromagnetic radiation spectrum. Wave and particle-like behavior, and how to calculate the wavelength or frequency of a light wave.

This has been well-known for quite some time; in fact, the Dutch physicist Christiaan Huygens first described the wave nature of light as far back as the late seventeenth century. For about 200 …

Learn how electromagnetic waves are formed from changing electric and magnetic fields. Understand the electromagnetic spectrum, including different regions from visible light to …

Learn AP Physics 2 with free lessons, exercises, and videos on light waves from Khan Academy.

Learn about electromagnetic radiation and take a tour of the electromagnetic spectrum.

frequency actually doesnt come in waves as shown in the videos but actually is shaped more like curve lines expanding outwards exponentially and nets when stacked. the light also fades and …

For light waves, polarization means the light waves are vibrating in a specific direction. Sunglasses with polarized lenses can block certain directions of light to reduce glare.

Introduction to refraction and its principles on Khan Academy.

Light refracts—it bends—when it passes from one medium into another at an angle. Refraction occurs because the phase velocity of light is different in different media. For example, light …