What are 2 ways EM waves differ from mechanical waves?
One way that mechanical waves are different than electromagnetic waves is that mechanical waves require a medium to travel through. The other way that these two wave types are different is that electromagnetic waves have a magnetic factor that mechanical waves do not possess.
On the electromagnetic spectrum, radio waves have the longest wavelengths of over 1 mm and the lowest frequency of 30 gigahertz to 300 kilohertz. Its measure of energy is less than 2 x 10^-24 joules which is the lowest on the electromagnetic spectrum. Radio waves are used to transmit television and radio programs.
Microwaves have the next longest wavelengths which measure at less than 1 decimeter. They have a frequency of between 3 gigahertz and 300 gigahertz. Microwaves contain an energy level of between 2 x 10^-24 and 2 x 10^22 joules. Microwaves can be seen in everyday life when cooking and mobile cell phones.
The wavelengths of x-rays range from .01 to 10 nanometers. X-rays' frequency ranges from 30,000 terahertz to 30,000,000 terahertz and their energy ranges from 2 x 10^-17 to 2 x 10^-14 joules. X-rays are used to locate and identify breaks or fractures in bones as well as locating cracks or damages in metal components of objects.
With wavelengths measuring less than .01 nanometers and frequencies greater than 30,000,000 terahertz, gamma ray waves can be used to kill cancer cells and sterilize surgical instruments. Their energy measures anything greater than 2 x 10^-14 joules.Gamma rays contain the most energy on the electromagnetic spectrum. They also have the shortest wavelengths and the highest frequency.