kinst
Jun19-07, 08:45 PM
1. The problem statement, all variables and given/known data
A diffraction grating uses light with a wavelength of 475 nm to generate an interference pattern. if the highest order maximum that appears is the fifth-order. what is the density of the grating in lines/cm?
2. Relevant equations
sinθ = mλ / d
t= (m + 1/2) (λ) / 2
3. The attempt at a solution
t = (m + 1/2) (λ) / 2
t - (5 + 1/2) (475 x 10^-9) / 2
t= (2.6125 x 10^-6) / 2
t= 1.30625 x 10^-6 cm
so i got the answer in cm and t is for thickness, but the question wants the answer in lines/cm, and i dont know how to get it like that, so plz anyone can help
A diffraction grating uses light with a wavelength of 475 nm to generate an interference pattern. if the highest order maximum that appears is the fifth-order. what is the density of the grating in lines/cm?
2. Relevant equations
sinθ = mλ / d
t= (m + 1/2) (λ) / 2
3. The attempt at a solution
t = (m + 1/2) (λ) / 2
t - (5 + 1/2) (475 x 10^-9) / 2
t= (2.6125 x 10^-6) / 2
t= 1.30625 x 10^-6 cm
so i got the answer in cm and t is for thickness, but the question wants the answer in lines/cm, and i dont know how to get it like that, so plz anyone can help