Light Energy

Front

What is light energy?

Back

Light energy is a form of electromagnetic energy that is visible to the human eye and is responsible for the sense of sight.

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through space and do not require a medium. They include radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays.

Front

What is the wavelength of a wave?

Back

Wavelength is the distance between two consecutive crests or troughs in a wave.

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

What is the crest of a wave?

Back

The crest is the highest point of a wave.

Front

What is the trough of a wave?

Back

The trough is the lowest point of a wave.

Front

How do you arrange electromagnetic waves from longest to shortest wavelength?

Back

The order is: Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays.

Front

What is the relationship between wavelength and frequency?

Back

Wavelength and frequency are inversely related; as the wavelength increases, the frequency decreases, and vice versa.

Front

What is visible light?

Back

Visible light is the portion of the electromagnetic spectrum that is visible to the human eye, typically ranging from wavelengths of about 400 to 700 nanometers.

Front

What is the speed of light?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s).