A parallel beam of sodium light of wavelength 589 nm is normally incident on a diffraction grating.If the second order diffraction maximum is observed at 50.25 degrees to the normal,then calculate the number of lines per cm of the grating. A)5.69 $\times$ 10⁵ cm^-1 B)1.53 $\times$ 10⁶ cm^-1 C)6.53 $\times$ 10³ cm^-1 D)1.31 $\times$ 10⁶ cm^-1 E)1.31 $\times$ 10⁴ cm^-1

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The Answer of A parallel beam of sodium light of wavelength 589 nm is normally incident on a diffraction grating.If the second order diffraction maximum is observed at 50.25 degrees to the normal,then calculate the number of lines per cm of the grating. A)5.69 $\times$ 10⁵ cm^-1 B)1.53 $\times$ 10⁶ cm^-1 C)6.53 $\times$ 10³ cm^-1 D)1.31 $\times$ 10⁶ cm^-1 E)1.31 $\times$ 10⁴ cm^-1

A Parallel Beam of Sodium Light of Wavelength 589 Nm ×\times×

A Parallel Beam of Sodium Light of Wavelength 589 Nm $\times$