Plasma was first discovered by Sir William Crookes in 1879. He used an electrical discharge tube that became known as a "Crookes tube." He first labeled plasma as "radiant matter" because of its luminous quality.
Plasma is the most common of the four types of matter. It comprises more than 99 percent of all matter in the universe. Plasma occurs when a state of matter contains a large amount of ionized particles and generates its own magnetic field. When under the influence of a magnetic field, it may form structures such as filaments, beams and double layers. The sun is made of plasma.Learn More
Optical illusions are caused by a mismatch of what the eyes see and what the brain interprets, according to ABC News. The brain is often tricked into thinking something is moving when contrasting colors are placed in close proximity to each other and repeated. This is why when people want a pattern to move like an optical illusion, the shapes of the pattern are outlined in black and white.Full Answer >
Sound travels through a medium as a mechanical wave. It cannot travel in a vacuum because it travels by vibrating the particles of the medium to transfer energy from one place to another.Full Answer >
Supersonic is defined as an object moving faster than the speed of sound. At sea level, the speed of sound is 768 mph. Most bullets fired from a gun travel faster than the speed of sound, and some aircraft are capable of achieving supersonic speed.Full Answer >
Polarized light can be identified by light waves aligned parallel to one another. Light is polarized when it is reflected from a transparent material-like glass or when it is scattered by particles suspended in the atmosphere.Full Answer >