Electromagnetic Spectrum

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, which includes waves of different frequencies and wavelengths.

Front

What are the main types of electromagnetic waves?

Back

The main types of electromagnetic waves include radio waves, microwaves, infrared waves, visible light, ultraviolet waves, X-rays, and gamma rays.

Front

What is the speed of electromagnetic waves in a vacuum?

Back

Electromagnetic waves travel at the speed of light, which is approximately 299,792 kilometers per second (or about 186,282 miles per second).

Front

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

Back

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

Front

What type of electromagnetic radiation is used in remote controls?

Back

Infrared radiation is used in remote controls to transmit signals.

Front

What is ultraviolet (UV) radiation?

Back

Ultraviolet radiation is a type of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays, and it can cause skin damage.

Front

How do scientists use radio waves in space exploration?

Back

Scientists use radio waves to communicate with spacecraft and to study cosmic phenomena.

Front

What is the visible spectrum?

Back

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye, consisting of light with wavelengths from approximately 400 to 700 nanometers.

Front

What is the primary source of electromagnetic radiation on Earth?

Back

The primary source of electromagnetic radiation on Earth is the Sun.

Front

What is the difference between UVA and UVB rays?

Back

UVA rays penetrate the skin more deeply and are associated with aging, while UVB rays are responsible for sunburn and can contribute to skin cancer.