P.5 Light Waves Unit test 2024

Front

What is a light wave?

Back

A light wave is an electromagnetic wave that is visible to the human eye and can travel through a vacuum.

Front

Why is a light wave not considered a mechanical wave?

Back

A light wave travels through the vacuum of space, while mechanical waves require a medium (like air or water) to travel.

Front

What happens to paint on a house when exposed to sunlight?

Back

The paint can take in energy from the light, causing it to be damaged over time.

Front

What is frequency in the context of waves?

Back

Frequency is the number of waves that pass a point in a certain amount of time, usually measured in Hertz (Hz).

Front

What is the relationship between wavelength and frequency?

Back

When wavelength decreases (gets shorter), frequency increases.

Front

What is amplitude in wave terminology?

Back

Amplitude is the maximum extent of a wave's oscillation, measured from its rest position.

Front

What is wavelength?

Back

Wavelength is the distance between successive crests (or troughs) of a wave.

Front

Can materials absorb energy from light?

Back

Yes, materials can absorb energy from certain types of light while reflecting others, like how green plants absorb red and blue light.

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 (km/s).

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, radio waves, and X-rays.