Electromagnetic Waves

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through the vacuum of space and consist of oscillating electric and magnetic fields. They include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

What is infrared radiation used for?

Back

Infrared radiation is used in various applications, including thermal imaging, remote controls, and heating.

Front

What is ultraviolet radiation?

Back

Ultraviolet radiation is a type of electromagnetic radiation that has a shorter wavelength than visible light and can cause sunburns and suntans.

Front

Which color of light has the highest energy?

Back

Violet light has the highest energy among visible colors.

Front

Which color of light has the lowest energy?

Back

Red light has the lowest energy among visible colors.

Front

Why does a banana appear yellow?

Back

A banana appears yellow because it reflects yellow light and absorbs other colors.

Front

What are the effects of ultraviolet radiation on the skin?

Back

Ultraviolet radiation can cause sunburn, skin aging, and increase the risk of skin cancer.

Front

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

Back

In electromagnetic waves, shorter wavelengths correspond to higher energy, while longer wavelengths correspond to lower energy.

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 kilometers per second).

Front

What is the visible spectrum?

Back

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye, ranging from red (longest wavelength) to violet (shortest wavelength).