Facts about Sunlight

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This diagram introduces sunlight, the light produced by the Sun, the star at the centre of our solar system.


It gathers together some useful facts and introduces some important terms that you can check out in the next section.

Remember that:

  • As the Sun explodes with the force of a billion one-megaton nuclear bombs every second it gives off electromagnetic radiation.
  • Sunlight is a form of electromagnetic radiation.
  • The electromagnetic radiation given off by the sun includes all wavelengths of the electromagnetic spectrum.
  • By the time sunlight has passed through the atmosphere and reaches the ground it contains infrared, visible, and ultraviolet wavelengths of light.
  • Viewed from the ground, sunlight contains a portion of the electromagnetic spectrum.
  • Viewed from outer space, sunlight contains all of the electromagnetic spectrum.
  • Without sunlight, life as we know it would not be possible because it carries the energy that plants need to grow and the heat that keeps the world warm.

Description

Facts about Sunlight

Facts about Sunlight

TRY SOME QUICK QUESTIONS AND ANSWERS TO GET STARTED
Our eyes respond so well to sunlight because of its intensity and because it contains all wavelengths of visible light.
Sunlight can be described in terms of both waves and particles.
Other names for sunlight include daylight, sunshine, visible light, light and electromagnetic radiation!
Sunshine is important to human beings because without light we can't see.

About the diagram

About the diagram
  • This diagram introduces sunlight, the light produced by the Sun, the star at the centre of our solar system.
  • It gathers together some useful facts and introduces some important terms concerning the Sun and the electromagnetic radiation it emits.
Remember that:
  • As the Sun explodes with the force of a billion one-megaton nuclear bombs every second it gives off electromagnetic radiation.
  • Sunlight is a form of electromagnetic radiation.
  • The electromagnetic radiation given off by the sun includes all wavelengths of the electromagnetic spectrum.
  • By the time sunlight has passed through the atmosphere and reaches the ground it contains infrared, visible, and ultraviolet wavelengths of light.
  • Viewed from the ground, sunlight contains only a small portion of the electromagnetic spectrum.
  • Viewed from outer space, sunlight contains the whole of the electromagnetic spectrum.
  • Without sunlight, life as we know it would not be possible because it carries the energy that plants need to grow and the heat that keeps the world warm.

Some key terms

Solar radiation

Solar radiation is the electromagnetic radiation emitted by the sun. Electromagnetic radiation is a type of energy that is commonly known as light ...

Electromagnetic radiation

Electromagnetic radiation is a type of energy more commonly simply called light. Detached from its source, it is transported by ...

Electromagnetic spectrum

The electromagnetic spectrum includes electromagnetic waves with all possible wavelengths of electromagnetic radiation, ranging from low energy radio waves through ...

Energy

Energy is a property of matter. Everything contains energy including all forms of matter and so all objects. Energy is ...

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