The Student Room Group

This discussion is now closed.

Check out other Related discussions

AS Physics - Diffraction Gratings

Can anyone help me with this question?

Discuss any difference between the interference patterns formed by (a) two parallel slits 1μm apart, (b) a diffraction grating with grating spacing 1μm, when illuminated with monochromatic light.

Rep on offer if anyone can help :smile:
Reply 1
Avatar for mctcdc0710
mctcdc0710
1
Using two slits the fringes are close to one another and u get a continuous pattern of bright - dark -bright-etc concetrated on the center of the screen . It is easy to calculated the fringe separation using a small ruler on the screen.

Using a difraction grating the bright fringes are much brighter and they are seperated from one another a long distance.
u can use the formula λκ = d sin(theta) to find the positions of the kth bright fringe.

Fringes may occur even at 90 degrees from u (instead of right ahead of u).

We tried those two in the laboratory and its pretty facinating
Reply 2
Avatar for James.R
James.R
OP
2
Thanks for that :biggrin:

Rep on its way

Related discussions

Latest

Trending

Trending

Articles for you