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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 :

Mariaziz

Answer:

dsinФ=mΔ

d=1/N

d=1/3500*[tex]10^{-2} m\\[/tex]

d=2.8*[tex]10^{-6}[/tex]

NOw apply all values on formula

dsinФ=mΔ

2.8*[tex]10^{-6\\}[/tex]sinФ=5*589*[tex]10^{-9}[/tex]

sinФ=1.05 error

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

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