Light Waves - All Chapters

Front

What is light?

Back

Light is a form of energy that travels in waves and can be seen by the human eye.

Front

What is the definition of 'wavelength'?

Back

Wavelength is the distance between two consecutive crests or troughs of a wave.

Front

What is a 'crest' in a wave?

Back

The crest is the highest point of a wave.

Front

What is a 'trough' in a wave?

Back

The trough is the lowest point of a wave.

Front

What does it mean to 'absorb' light?

Back

To absorb light means to take in light energy, which can cause changes in materials.

Front

What is the difference between reflection and absorption of light?

Back

Reflection is when light bounces off a surface, while absorption is when light is taken in by a material.

Front

What is a laser?

Back

A laser is a device that emits a concentrated beam of light through a process of optical amplification.

Front

How can light cause chemical changes?

Back

Light can provide energy that initiates chemical reactions, such as in photosynthesis.

Front

What is the role of light in photosynthesis?

Back

Light provides the energy needed for plants to convert carbon dioxide and water into glucose and oxygen.

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light.