Light Energy

Front

What is light energy?

Back

Light energy is a form of energy that travels in waves and can be seen by the human eye. It is responsible for the illumination of our surroundings.

Front

Which color of light has the longest wavelength?

Back

Red has the longest wavelength in the visible spectrum.

Front

What is wavelength?

Back

Wavelength is the distance between two consecutive peaks (or troughs) of a wave.

Front

What is the relationship between wavelength and frequency?

Back

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

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through a vacuum and do not require a medium. They include visible light, radio waves, X-rays, and more.

Front

Why do we need lead aprons during X-rays?

Back

Lead aprons are used to protect patients from harmful exposure to X-rays.

Front

What is the medium in sound transmission?

Back

A medium is a substance (solid, liquid, or gas) through which sound waves travel.

Front

Can sound travel in outer space?

Back

No, sound cannot travel in outer space because there is no medium.

Front

What is amplitude?

Back

Amplitude is the height of a wave from its rest position to its crest or trough, indicating the energy of the wave.

Front

What is the speed of light?

Back

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