Question

calculate a minimum number of lines a grating must have to resolve the 5890 amstrong line emiited by sodium vapour lamp in the 2nd order spectrum also calculate the grating element if width of the element is 3 cm​

Answer 1

Given:- m = 1. λ1=5890Ao. λ2=5896Ao. To find:- N. Solution:- The Resolving power is given by. λdλ=mN. dλ=|λ1−λ2|=|5896−5890|=6Ao. λ2<λ1 R.P for λ1 will ...