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 is the relationship between wavelength and frequency?

Back

As the wavelength of a wave increases, its frequency decreases, and vice versa. This means that longer wavelengths correspond to lower frequencies and lower energy.

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that consist of electric and magnetic fields oscillating perpendicular to each other and to the direction of wave propagation. They can travel through empty space.

Front

What type of electromagnetic waves are used in broadcasting?

Back

Radio waves are used in broadcasting for transmitting audio and video signals.

Front

What are ultraviolet rays?

Back

Ultraviolet rays are a type of electromagnetic radiation that can help the body produce vitamin D and are found just beyond the visible light spectrum.

Front

How do electromagnetic waves differ from mechanical waves?

Back

Electromagnetic waves do not require a medium to travel through, while mechanical waves need a medium (like air, water, or solids) to propagate.

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 are the uses of infrared waves?

Back

Infrared waves are used in various applications, including remote controls, thermal imaging, and night vision.

Front

What are X-rays used for?

Back

X-rays are used primarily in medicine for imaging bones and internal structures of the body.

Front

What are gamma rays?

Back

Gamma rays are the highest energy form of electromagnetic radiation and are used in cancer treatment and imaging.