Question

1. what is the electromagnetic spectrum?
2. how fast do electromagnetic waves travel?
3. true or false? radio waves have the longest wavelength and the lowest frequency of all waves.
4. what type of wave is commonly used to cook food?
5. identify one use for ultraviolet rays.
6. what type of wave often damages human tissue and causes sunburns?
7. which point below shows the location of radio waves on the electromagnetic spectrum? (diagram on sign)
8. what is the term that describes a wave that does not need a medium in order to travel?
9. the part of the electromagnetic spectrum that the human eye is able to see is known as
10. what type of energy is transferred by electromagnetic waves?
11. which point below shows the location of visible light on the electromagnetic spectrum? (diagram on sign)

Explanation:

1. Electromagnetic waves travel at the speed of light, which is approximately \(3\times10^{8}\) meters per second in a vacuum.
2. Ultraviolet (UV) rays often damage human tissue and cause sunburns.
3. A wave that does not need a medium to travel is called an electromagnetic wave.
4. The part of the electromagnetic spectrum that the human eye can see is called the visible spectrum.

Answer:

1. \(3\times10^{8}\) meters per second in a vacuum.
2. Ultraviolet (UV) rays.
3. Electromagnetic wave.
4. Visible spectrum.