Electromagnetic Waves

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves of energy that travel through space at the speed of light, consisting of oscillating electric and magnetic fields.

Front

List the types of electromagnetic waves in order from least to greatest energy.

Back

Radio, Visible, Gamma.

Front

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

Back

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

Front

Which type of electromagnetic wave has the longest wavelength?

Back

Radio waves have the longest wavelength.

Front

Which type of electromagnetic wave has the shortest wavelength?

Back

Gamma rays have the shortest wavelength.

Front

What is the frequency of a wave?

Back

Frequency is the number of waves that pass a given point in one second, measured in Hertz (Hz).

Front

How does frequency relate to wavelength in electromagnetic waves?

Back

Frequency and wavelength are inversely related; as frequency increases, wavelength decreases.

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).

Front

What is redshift in the context of electromagnetic waves?

Back

Redshift occurs when light from an object is shifted to longer wavelengths, indicating that the object is moving away from the observer.

Front

What is blueshift in the context of electromagnetic waves?

Back

Blueshift occurs when light from an object is shifted to shorter wavelengths, indicating that the object is moving towards the observer.