EM 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.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, from radio waves to gamma rays.

Front

What type of electromagnetic wave is used for communication?

Back

Radio waves are commonly used for communication, including radio and television broadcasts.

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 (186,282 miles per second).

Front

What are ultraviolet rays?

Back

Ultraviolet rays are a type of electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays, known for causing sunburn.

Front

What is infrared radiation?

Back

Infrared radiation is a type of electromagnetic wave that is felt as heat and is used in various technologies, including remote controls and thermal imaging.

Front

What are X-rays used for?

Back

X-rays are used in medicine to create images of the inside of the body, helping to diagnose fractures and other conditions.

Front

What are gamma rays?

Back

Gamma rays are the highest frequency electromagnetic waves, often produced by radioactive materials and used in cancer treatment.

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 the longest wavelength in the electromagnetic spectrum?

Back

Radio waves have the longest wavelength in the electromagnetic spectrum.