What is light?

Light is a form of energy which our sense of sight can detect. It is made of electro-magnetic radiation and travels in a straight path.

What is the speed of light?

The speed of light is the speed at which light travels. It is about 300,000 kilometres per second. Nothing travels faster than light.

Why are there different colours of light?

There are different colours of light because they are light waves which have different wavelengths. Red light has the longest wavelength while violet light has the shortest wavelength.

Light energy Definition Kids

What are the primary colours of light?

Red, green and blue are the primary colours of light. Mixing them in various ways will make all other colours, including white.

What is reflection?

The bouncing back of light waves when they hit an object with a very smooth and shiny surface, like a mirror, is called reflection.

 

Light energy Definition Kids

What is refraction?

The bending of light as it passes from one transparent substance to another, like air to water, is called refraction.

What makes a rainbow?

When sunlight is intercepted by a drop of water in the atmosphere, some of the light refracts into the drop, reflects from the drop's inner surface, and then refracts out of the drop. The first refraction separates the sunlight into its component colours, and the second refraction increases the separation. The result is a rainbow.

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Light energy Definition Kids

This article Light Energy helps kids to explore the nature of light, the movement of light, natural and man-made sources of light, and the special behaviours and properties of light. Visible light is only one small portion of a family of waves called electromagnetic (EM) radiation. The entire spectrum of these EM waves includes radio waves, which have very long wavelengths and both gamma rays and cosmic rays, which are at the other end of the spectrum and have very small wavelengths. Visible light is near the middle of the spectrum. 


 

Light energy Definition Kids

  • Kids Definition: Light energy is a form of energy which our sense of sight can detect.

  • Kids Definition: Light energy is made of electro-magnetic radiation and travels in a straight path.

  • Kids Definition: Light energy  has the ability to tan or burn our skins, it can be harnessed to melt metals, or heat our food.

  • Kids Definition: Light energy is always in motion and cannot be stored, so it is a kinetic type of energy.

  • Kids Definition: Light is simultaneously a wave and a particle.

  • Kids Definition: The particle in light energy is called as photon.

 

Light energy Definition Kids

The quantum theory suggests that light consists of very small bundles of energy/particles; it's just that simple. Scientists call those small particles photons, and the wavelength determines the energy and type of EM radiation, and the number of photons tells you how much radiation there is. A lot of photons give a brighter, more intense type of light.

Fewer photons give a very dim and less intense light. When you use the dimmer switch on the wall, you are decreasing the number of photons sent from the light bulb. The type of light is the same while the amount has changed. 


 

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Light energy Definition Kids

  • Kids Definition: Light energy refers to the electromagnetic energy that is visible to the human eye.
  • Kids Definition: Light energy is energy that travels in straight lines called rays that fan outward from the source of the light?
  • Kids Definition: Light energy is made of electro-magnetic radiation and travels in a straight path.

 

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More Light energy Definition Kids

  • Kids Definition:Sun is the best example for light energy. The sun gives plants light energy which afterward is converted into chemical energy.
  • Kids Definition: Light energy can also be converted into thermal energy when for example the sun heats up your black shirt or a brick wall outside.
  • Kids Definition: Even a burning candle is an example for light energy.
  • Kids Definition: Light energy can be converted into chemical energy when the plants absorb the light energy; they convert it into chemical energy for their own nutrition.

 

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