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. They include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another due to a change in its speed.

Front

What is the speed of light in a vacuum?

Back

The speed of light in a vacuum is approximately 299,792 kilometers per second (or about 186,282 miles per second).

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, organized by wavelength or frequency, from radio waves to gamma rays.

Front

What are UV rays?

Back

Ultraviolet (UV) rays are a type of electromagnetic radiation that comes from the sun and can cause sunburn and skin cancer.

Front

What happens to light when it enters a denser medium?

Back

When light enters a denser medium, it slows down and bends towards the normal line.

Front

What are microwaves used for?

Back

Microwaves are used for various applications, including cooking food, transmitting signals in cell phones, and radar technology.

Front

What is reflection?

Back

Reflection is the bouncing back of light when it hits a surface that it cannot pass through.

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 are gamma rays?

Back

Gamma rays are high-energy electromagnetic waves with very short wavelengths, often produced by radioactive atoms and in nuclear reactions.