Physics Quiz on Light and Speed

<p>Light bulb (A)</p> Signup and view all the answers

<p>Reflect light from other sources (B)</p> Signup and view all the answers

Light is the fastest thing in the universe. It travels in a straight line and does not need a medium to travel. Light is a form of energy that travels as an electromagnetic wave.

Visible light is a part of the electromagnetic spectrum that humans can see. It is made up of a continuous sequence of colors, known as the visible spectrum. The most common way to remember the order of colors in the visible spectrum is using the acronym ROYGBIV.

The sun is a star that produces its own light through nuclear fusion. This process releases enormous amounts of energy in the form of light and heat.

Incandescence is the production of light due to high temperatures. Materials become so hot that they start to emit light, like a light bulb.

Phosphorescence is the emission of light by a substance after it has been exposed to ultraviolet light. This causes the substance to glow for a period of time after the light source is removed.