Physics Help Forum Light and Refraction

 Electricity and Magnetism Electricity and Magnetism Physics Help Forum

 Apr 3rd 2017, 11:02 AM #1 Junior Member   Join Date: Apr 2017 Posts: 2 Light and Refraction So I have a homework problem that I am confused about. The problem is: An insulated light bulb is at the bottom of a swimming pool 2.5m from the wall. The pool is 2.5m deep and is completely filled with water. At what angle does the light break the water at the edge of the pool? N for water is 1.33. If someone could explain, that would be great
 Apr 3rd 2017, 11:10 AM #2 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 479 Have you heard of Snell's Law ?
Apr 3rd 2017, 11:16 AM   #3
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 Originally Posted by studiot Have you heard of Snell's Law ?
No, we just covered that C1/C2 = N1SinTheda1/N2SinTheta2. No idea what Snell's law is. We did one two examples in class but it was more basic where we were given the wavelength and the N and asked to find the speed.

 Apr 3rd 2017, 12:12 PM #4 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 479 Yes you have, you just don't realise it. Snell's law covers the refraction situation you have just stated the formula for. Have a look at the diagram and the references in the link at the bottom, and compare with the information from your lectures. When a light ray passes from a lmore dense medium (water) to a less dense medium is it refracted towards or away from the normal? Or if you like does it travel faster in the more or less dense medium? https://www.google.co.uk/search?hl=e...uKuzuPoE#spf=1

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