At what angle will the second order (m = 2)maximum occur for a wavelength of 450 nm using a diffraction grating with 10,000 lines per cm?
A) 64°
B) 27°
C) 53°
D) No second order maximum will occur in this case.

Question

Quizplus · Accepted Answer

Using the diffraction grating formula $d \sin \theta = m \lambda$, where $d = \frac{1}{10,000 \text{ lines/cm}} = 1 \times 10^{-6} \text{ m}$, $\lambda = 450 \times 10^{-9} \text{ m}$, and $m = 2$, we find $\theta \approx 64^\circ$.

At What Angle Will the Second Order (M = 2)maximum