What is the angular separation of two spectral lines of wavelengths 308 nm and 254 nm formed in order m = 3 with a 529 line/mm grating?
Spacing between slit = 1 mm/529
= 1.89036*10^-3 mm
d = 1.89036*10^-6 m
We know that ;
dsinθ=mλ
Thus,
dsin(θ1)=mλ1
θ1=arcsin(3*308*10^-9/1.89036*10^-6)
=29.26º
dsin(θ2)=mλ2
θ2=arcsin(3*254*10^-9/1.89036*10^-6)
=23.77º
Angular separation of two spectral lines = θ1-θ2 = 29.26º-23.77º
= 5.49º
What is the angular separation of two spectral lines of wavelengths 308 nm and 254 nm...
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