End of Unit F Review

Front

What are gamma rays?

Back

Gamma rays are a type of electromagnetic radiation with the highest frequencies and shortest wavelengths. They are used in medical applications such as diagnosing and treating cancer.

Front

What is the role of microwaves in communication?

Back

Microwaves are electromagnetic waves used in ovens and for communication in devices like cell phones.

Front

List the electromagnetic waves in order of decreasing frequency.

Back

Gamma rays, X-rays, Ultraviolet rays, Visible light, Infrared rays, Microwaves, Radio waves.

Front

What type of waves are used in broadcasting?

Back

Radio waves are used in broadcasting.

Front

What are X-rays used for?

Back

X-rays are used primarily for medical imaging to view the inside of the body.

Front

What is the difference between infrared rays and ultraviolet rays?

Back

Infrared rays have longer wavelengths than visible light and are used in heat applications, while ultraviolet rays have shorter wavelengths and can cause sunburn.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Electromagnetic waves travel at the speed of light, which is approximately 299,792 kilometers per second (km/s).

Front

What are the applications of ultraviolet rays?

Back

Ultraviolet rays are used in sterilization, fluorescent lights, and detecting counterfeit money.

Front

How do microwaves heat food?

Back

Microwaves heat food by causing water molecules in the food to vibrate, producing heat.

Front

What is the wavelength range of radio waves?

Back

Radio waves have wavelengths that can range from a few millimeters to thousands of kilometers.