IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: yasser37 on May 02, 2010, 01:35:17 pm

Title: Physics doubt
Post by: yasser37 on May 02, 2010, 01:35:17 pm

Hi guys


I can't seem to be able to solve any question about Diffraction Grating n paper 1


how do you do those?/


thanks

Title: Re: Physics doubt
Post by: Saladin on May 02, 2010, 01:49:50 pm

Would you kindly provide a sample question?

Title: Re: Physics doubt
Post by: tmisterr on May 02, 2010, 02:15:16 pm

use the equation

d*sinx=n*wavelength

where d is the spacing of the diffraction grating, x is the angle at which the order is seen, n is the order.
remember to use S.I units for d and wavelength so convert nm to m or mm to m e.Take Care.
and if your told a diffraction grating has for example 500 lines per metre, you have to remember this is not the spacing, to get the spacing you have to do 1/500. This should help you out a little.

Title: Re: Physics doubt
Post by: ~ A.F ~ on May 02, 2010, 05:35:06 pm

Try http://s-cool.co.uk/alevel/physics/diffraction.html

Really Helpful