Electromagnetic Waves

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, which includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

Which electromagnetic wave has the lowest frequency?

Back

Microwaves have the lowest frequency among the options provided.

Front

What type of telescopes are needed to observe short-wavelength radiation from space?

Back

Gamma-ray telescopes must be placed in orbit around Earth to observe short-wavelength radiation.

Front

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

Back

As the wavelength increases, the energy of the electromagnetic wave decreases.

Front

Which electromagnetic wave has the largest wavelength?

Back

Radio waves have the largest wavelength in the electromagnetic spectrum.

Front

What are gamma rays?

Back

Gamma rays are high-energy electromagnetic waves with very short wavelengths, typically less than 0.01 nanometers.

Front

What are X-rays used for?

Back

X-rays are used in medical imaging to view the inside of the body, as they can penetrate soft tissues but are absorbed by denser materials like bones.

Front

How does Earth's atmosphere affect the observation of electromagnetic waves?

Back

Earth's atmosphere blocks certain wavelengths of electromagnetic radiation, particularly short wavelengths like ultraviolet and gamma rays.

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 visible spectrum?

Back

The visible spectrum is the portion of the electromagnetic spectrum that can be detected by the human eye, typically ranging from about 400 to 700 nanometers.