Difference between revisions of "Light"
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===About Light=== | ===About Light=== | ||
: [[Light]] is a [[Transverse Wave|transverse wave]]. | : [[Light]] is a [[Transverse Wave|transverse wave]]. | ||
| + | : [[Light]] can travel through a [[vacuum]] as well as through any [[transparent]] [[solid]], [[liquid]], [[gas]]. | ||
| + | As a [[wave]] [[light]] can be: | ||
| + | *[[Transmit|Transmitted]] - [[Light]] can pass through a [[medium]]. | ||
| + | *[[Reflection|Reflected]] - [[Light]] can bounce of a surface. This can be either [[Diffuse Reflection]] or [[Specular Reflection]]. | ||
| + | *[[Refraction|Refracted]] - [[Light]] can change direction when it changes [[medium]]. | ||
| + | : The [[speed]] of [[light]] through a [[vacuum]] is 300,000,000[[m/s]]. | ||
| + | Light can be divided into 7 [[colour]]s: | ||
| + | *Red | ||
| + | *Orange | ||
| + | *Yellow | ||
| + | *Green | ||
| + | *Blue | ||
| + | *Indigo | ||
| + | *Violet | ||
Revision as of 21:15, 20 October 2018
Contents
Key Stage 2
Meaning
Light is what we can see with our eyes and dark is when there is not enough light to see things clearly.
About Light and Dark
- Light can be very bright or it can be very dark.
- When light is very bright it can hurt our eyes. Light from the sun is very bright and we shouldn't look at the sun because it can cause people to go blind.
- When there is not enough light to see we say it is dark. At night time it is very dark which is why it is hard to see.
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| No-one can see because there is no light so the room is dark. | The man can see the light bulb because light from the bulb goes into the man's eyes. The boy cannot see the light bulb because his eyes are closed. |
Key Stage 3
Meaning
Light is a wave that transfers energy and information.
About Light
- Light is a transverse wave.
- Light can travel through a vacuum as well as through any transparent solid, liquid, gas.
- Transmitted - Light can pass through a medium.
- Reflected - Light can bounce of a surface. This can be either Diffuse Reflection or Specular Reflection.
- Refracted - Light can change direction when it changes medium.
Light can be divided into 7 colours:
- Red
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet