Licht is a form o energy. Onythin wi a temperatur abuin absolute zero emits (gies aff) licht. Licht is cried "electromagnetic radiation" an aw. Licht is makkit up o tottie particles cried photons.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/%D7%A4%D7%90%D7%A8%D7%A7_%D7%94%D7%9B%D7%A8%D7%9E%D7%9C_4_-_%D7%92%D7%A0%D7%99%D7%9D_%D7%9C%D7%90%D7%95%D7%9E%D7%99%D7%99%D7%9D_%D7%91%D7%A6%D7%A4%D7%95%D7%9F_%D7%94%D7%90%D7%A8%D7%A5_-_%D7%90%D7%AA%D7%A8%D7%99_%D7%9E%D7%95%D7%A8%D7%A9%D7%AA_2016_%28348%29.jpg/640px-%D7%A4%D7%90%D7%A8%D7%A7_%D7%94%D7%9B%D7%A8%D7%9E%D7%9C_4_-_%D7%92%D7%A0%D7%99%D7%9D_%D7%9C%D7%90%D7%95%D7%9E%D7%99%D7%99%D7%9D_%D7%91%D7%A6%D7%A4%D7%95%D7%9F_%D7%94%D7%90%D7%A8%D7%A5_-_%D7%90%D7%AA%D7%A8%D7%99_%D7%9E%D7%95%D7%A8%D7%A9%D7%AA_2016_%28348%29.jpg)
Licht muives at the speed o licht, aboot 300,000 km, or aboot 186,000 mile, per seicont. This means it taks aboot 1.2 seicont for licht tae reach the Yird frae the Muin.
Licht muives in a straucht line, binna thare's a gravitational field naurhaund, makkin shaidaes whan the peth o licht is ditit. Mair solit things will hae a daurker shaidae, things that are mair clear hae a lichter shaidae, an transparent things willna hae ane or hae a gey wee shaidae.
Wir een react tae licht; whan we see somethin we see the licht it reflects, or the licht it emits. For ensaumple, a laump gies aff licht, an awthing ense in the same room as the laump reflects its licht.
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