- #1
mutineer123
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Homework Statement
Im having a bit trouble with diffraction gratings lately, with sums like this:
A parallel beam of light of wavelength 450 nm falls normally on a diffraction grating which has
300 lines /mm.
What is the total number of transmitted maxima?
A 7
B 8
C 14
D 15
Homework Equations
dsin∅=nλ
The Attempt at a Solution
Well, my answer has no reasoning, so you might as well not read it:
I took d as 3.33X10^-6, lambda as 450 X 10^-9, and ∅as 90(to be honest I don't really know why I took it as 90!)
Can anyone redirect me to a good diffraction grating video/website if they know of any? I really neeed to understand how to plug in units into the formulae.