Waves and Information Review

A wave is a disturbance that transfers energy from one place to another without transferring matter.

The main parts of a wave are the crest (the highest point), trough (the lowest point), amplitude (the height of the wave), and wavelength (the distance between two consecutive crests or troughs).

Amplitude is the maximum height of a wave from its rest position. It measures the energy of the wave.

Wavelength is the distance between two consecutive points that are in phase on a wave, such as from crest to crest or trough to trough.

In a transverse wave, the motion of the medium is perpendicular to the direction of the wave. In a longitudinal wave, the motion of the medium is parallel to the direction of the wave.

The crest of a wave represents the highest point of the wave.

The trough of a wave represents the lowest point of the wave.

A satellite is a device that receives and transmits signals to and from the Earth, allowing for communication and broadcasting.

An antenna is used to send and receive signals in a communication system.

A camera has parts that function like the human eye: the lens focuses light like the eye's lens, the digital sensor captures images like the retina, and the aperture controls light entry like the pupil.