Question

Visible light of wavelength 589 nm is incident on a diffraction grating that has 3500 lines/cm. At what angle with respect to the central maximum is the fifth order maximum observed

Answer 1

Answer:

dsinФ=mΔ

d=1/N

d=1/3500*$10^{-2} m$

d=2.8*$10^{-6}$

NOw apply all values on formula

dsinФ=mΔ

2.8*$10^{-6\\}$sinФ=5*589*$10^{-9}$

sinФ=1.05 error

so due fifth maximum order it cannot be soved by this grating