Ch. 4 Practice Test #3-EMS

Front

What are electromagnetic (EM) waves?

Back

Electromagnetic waves are waves of energy that travel through space at the speed of light. They include a range of wave types, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet light, X-rays, and gamma rays.

Front

Which type of EM wave has the highest frequency and energy?

Back

Gamma Rays.

Front

Which type of EM wave has the lowest frequency and energy?

Back

Radio Waves.

Front

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

Back

As the frequency of a wave increases, the wavelength decreases.

Front

What type of EM waves can be blocked by wearing sunglasses and sunscreen?

Back

Ultraviolet (UV) Light.

Front

What are microwaves used for?

Back

Microwaves are used for cooking food, radar, and communication technologies like cell phones.

Front

What is visible light?

Back

Visible light is the portion of the electromagnetic spectrum that is visible to the human eye, allowing us to see colors.

Front

What is infrared radiation?

Back

Infrared radiation is a type of EM wave that is felt as heat and is used in technologies like remote controls and thermal imaging.

Front

What are X-rays used for?

Back

X-rays are used in medical imaging to view the inside of the body, particularly bones.

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 (or about 186,282 miles per second).