Physics - Diffraction grating
This question is from AQA Physics A-Level textbook
1) Light of wavelength 430nm is directed normally at a diffraction grating. The first order transmitted beams are at 28 degrees to the zero order beam.
A) Calculate the Number of slits per millimetre on the diffraction grating.
B) The angle of diffraction for each of the other diffracted orders of the transmitted light.
For A)
I thought these are the values:
wavelength = 430x10^-9
n=1
sin28
then to rearrange the equation for d=(n x wavelengh)/sin28
however I can't seam to get the right answer
1) Light of wavelength 430nm is directed normally at a diffraction grating. The first order transmitted beams are at 28 degrees to the zero order beam.
A) Calculate the Number of slits per millimetre on the diffraction grating.
B) The angle of diffraction for each of the other diffracted orders of the transmitted light.
For A)
I thought these are the values:
wavelength = 430x10^-9
n=1
sin28
then to rearrange the equation for d=(n x wavelengh)/sin28
however I can't seam to get the right answer
Thanks, I got my answer of d and forgot to do n=1/d and convert into mm
Thanks for the help
Thanks for the help
Original post by lordaxil
is the distance between slits in the grating. A) asks for the number of slits per millimetre. Can you see how they are related?
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