A light wave is a type of electromagnetic wave. Light waves on the electromagnetic spectrum include those that are visible as well as those that are invisible to the human eye.
The average human eye is able to see light with wavelengths between approximately 390 to 700 nanometers, or nm. Violet light is at the top of the spectrum while red is at the bottom. The invisible light found beyond 390 nm is called infrared. The invisible light above 700 nm is called ultraviolet. Radio waves and gamma rays also exist on the electromagnetic spectrum at different wavelengths than both visible and invisible light.Learn More
Primary waves are the fastest kind of waves that occur during earthquakes. They are the first to hit areas surrounding the seismic activity and can move through solid and liquid layers of the ground.Full Answer >
Radio waves make up the part of the electromagnetic spectrum with the longest wavelengths. Radio waves are used in radio and television broadcasts, satellite transmissions and cell phone signals. Astronomical objects give off radio waves which can be detected by radio telescopes.Full Answer >
Waves travel by transferring energy from particle to particle through a medium such as air or water. In some cases, this energy transfer creates a motion perpendicular to the direction of travel, creating transverse waves. Other waves travel by compressing the medium and creating motion parallel to the direction of movement, such as the longitudinal waves that transmit sound through the air.Full Answer >
How Stuff Works explains that sound travels in mechanical waves, and these waves are disturbances that cause energy to move. The energy is then transported through a medium. Disturbances occur when an object vibrates. This vibration is caused by interconnected and interactive particles.Full Answer >