Specimen paper 2 question 1.5
I really dont understand how youre supposed to do this question
Calculate the number of lines per metre on the grating.
https://i.gyazo.com/7f4b28a5757ec01c63fc6c5b232aeb7f.png
Edit: nevermind i worked it out, you had to use your answer from the previous question divine by 2.5m, then rearrage d.sintheta = n.lambda for d which is d = (n.lambda/sintheta)
then take the reciprocal of your answer
Calculate the number of lines per metre on the grating.
https://i.gyazo.com/7f4b28a5757ec01c63fc6c5b232aeb7f.png
Edit: nevermind i worked it out, you had to use your answer from the previous question divine by 2.5m, then rearrage d.sintheta = n.lambda for d which is d = (n.lambda/sintheta)
then take the reciprocal of your answer
(edited 7 years ago)
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