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

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