Electromagnetic Spectrum

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the complete range of electromagnetic waves arranged in order of increasing frequency.

Front

What type of waves are used in broadcasting?

Back

Radio waves are used in broadcasting.

Front

How does the energy of shorter and longer waves compare?

Back

Shorter waves have higher energy, while longer waves have lower energy.

Front

Which electromagnetic wave has the shortest wavelength?

Back

Gamma rays have the shortest wavelength and the highest frequency.

Front

What type of electromagnetic waves help doctors detect broken bones?

Back

X-rays help doctors detect broken bones.

Front

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

Back

As wavelength increases, frequency decreases.

Front

What are infrared rays used for?

Back

Infrared rays are used in remote controls and thermal imaging.

Front

What is the frequency range of radio waves?

Back

Radio waves have frequencies ranging from about 3 kHz to 300 GHz.

Front

What type of electromagnetic waves can cause sunburn?

Back

Ultraviolet rays can cause sunburn.

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 300,000 km/s).