I'm a beginning secondary science teacher (admittedly with a biology specialism), and if I had to second guess a GCSE paper, I'd say it was simply asking why there is no refraction at A, whilst there is at B, in the diagram below:
http://img151.imageshack.us/img151/3686/flowroot5110jd8.png...
Maybe if you ignore whatever is happening first on the right (assuming the light is going right->left), and imagine the light is just a 'horizontal' beam, like the one in the centre.
Are they not just asking you to talk about the 'normal', as you did above?
Thanks Kurdt. A much-appreciated pointer.
Does that mean that the following is true?:
http://img259.imageshack.us/img259/7027/screenshot3ch4.png
It was this youtube video that took me there... http://youtube.com/watch?v=OS-EnAFKWpI
Seems like a great resource for basic maths tips.
[SOLVED] Radioactive decay
Hi guys, this is just a basic maths incompetency. I hope someone can guide me forwards! (Slack biology student, delving into physics)
I can do (a) with no problems, and thus I can probably do the latter half of (b) and (c) without issue. My stumbling point is...