Light is a form of electromagnetic radiation, and one of its properties is wavelength, which is the distance between two consecutive peaks or troughs of a wave.

The speed of light in a vacuum is approximately 300,000 kilometers per second, or 299,792,458 meters per second, or 186,282 miles per second.

The Sun, candles, and light bulbs are all examples of light sources, as they emit light energy.

Refraction is the process by which light changes direction when it passes from one medium to another, such as from air to water or from glass to air.

The angle between the incident ray and the normal to the surface at the point of incidence is called the angle of incidence.

The angle of incidence and the angle of reflection are equal, according to the law of reflection.

Diffraction is the phenomenon by which light bends around the edges of an object, causing it to spread out and create a pattern of light and dark bands.

Dispersion is the process by which light waves are separated into their component colors, such as when white light passes through a prism.

Interference is the phenomenon by which light waves can be combined to create a new wave with a different wavelength, such as when two waves of the same frequency interact.

Polarization is the property of light that allows it to vibrate in different directions, such as horizontally, vertically, or circularly.

The unit of measurement for the frequency of light is Hertz (Hz), which represents the number of oscillations or cycles per second.

The frequency and wavelength of light are inversely proportional, meaning that as the frequency increases, the wavelength decreases, and vice versa.

The electromagnetic spectrum is the range of all possible frequencies, wavelengths, and energies of electromagnetic radiation.

Sound waves are not a type of electromagnetic radiation, as they are mechanical waves that require a medium to propagate.

The primary color of light that is most visible to the human eye is green, as it is the color to which the human eye is most sensitive.