Electromagnetic Spectrum

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

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through empty space and do not require a medium. They are made up of oscillating electric and magnetic fields.

Front

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

Back

As the frequency of an electromagnetic wave increases, its wavelength decreases, and vice versa. This is described by the equation: speed = frequency × wavelength.

Front

What type of waves have the longest wavelengths in the electromagnetic spectrum?

Back

Radio waves have the longest wavelengths in the electromagnetic spectrum.

Front

What type of waves have the shortest wavelengths in the electromagnetic spectrum?

Back

Gamma rays have the shortest wavelengths in the electromagnetic spectrum.

Front

How does energy relate to frequency in electromagnetic waves?

Back

The energy of an electromagnetic wave is directly proportional to its frequency; as frequency increases, energy increases.

Front

What part of the electromagnetic spectrum is visible to the human eye?

Back

The visible part of the electromagnetic spectrum is only a small portion, ranging from approximately 400 nm (violet) to 700 nm (red) in wavelength.

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 infrared radiation?

Back

Infrared radiation is a type of electromagnetic radiation with wavelengths longer than visible light but shorter than microwaves, typically ranging from about 700 nm to 1 mm.

Front

What is ultraviolet radiation?

Back

Ultraviolet (UV) radiation is a type of electromagnetic radiation with wavelengths shorter than visible light, typically ranging from about 10 nm to 400 nm.