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Asked by elephant28 to Andrew, Jade, Jessica, Kevin on 24 Jun 2015.
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Jess Wade answered on 24 Jun 2015:
Hey elephant28 – this is a good question and is about light being both a little energetic particle (called a photon) and a wave. When we turn on a light, lots of little packets of energy stream towards us called photons. The more photons there are, the brighter the light is! How easy is that. Depending on the energy of the photons, the light changes colour. If we think of light as being a wave, and we draw out the wiggles of a wave, the intensity is in the height or ‘amplitude’. When we have a light at home with a dimmer, we control how much electricity gets to the bulb by changing the resistance of the wire. It is with a clever component called a ‘variable resistor’
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Andrew Fensham-Smith answered on 24 Jun 2015:
Light itself is made of things called photons. A photon is a particle which has a certain amount of energy and hits your eye – the amount of energy it has tells your eye its colour. The number of them which hit your eye tells you how bright it is. So when light gets brighter, more photons are hitting your eye and your eye is telling you its brighter!
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