Electromagnetic Radiation

Front

What is electromagnetic radiation?

Back

Electromagnetic radiation is a form of energy that travels through space at the speed of light and includes a range of waves such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

What is the relationship between frequency and wavelength in electromagnetic waves?

Back

As the frequency of an electromagnetic wave increases, its wavelength decreases. This is an inverse relationship.

Front

What type of electromagnetic waves are used in microwave ovens?

Back

Microwaves are used in microwave ovens to vibrate water molecules, which heats food.

Front

What are radio waves used for?

Back

Radio waves are used for communication, including radio broadcasting, television signals, and radar.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, organized by wavelength or frequency.

Front

What are infrared waves commonly used for?

Back

Infrared waves are commonly used in remote controls, thermal imaging, and night vision technology.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

The speed of electromagnetic waves in a vacuum is approximately 299,792 kilometers per second (or about 186,282 miles per second).

Front

What is the primary effect of ultraviolet waves on human skin?

Back

Ultraviolet waves can cause sunburn and increase the risk of skin cancer due to their ability to damage DNA.

Front

How do X-rays work?

Back

X-rays are a form of high-energy electromagnetic radiation that can penetrate soft tissues but are absorbed by denser materials like bones, making them useful for medical imaging.

Front

What is the difference between visible light and other electromagnetic waves?

Back

Visible light is the portion of the electromagnetic spectrum that can be detected by the human eye, while other waves (like radio or X-rays) are not visible.