Monochromatic light from a He-Ne laser ($\lambda$ = 632.8 nm)is incident on a diffraction grating containing 5 000 lines/cm.Determine the angle of the first-order maximum.
A)18.4$\degree$
B)39.2$\degree$
C)14.6$\degree$
D)27.7$\degree$
E)13.9$\degree$

Question

Quizplus · Accepted Answer

The angle of the first-order maximum can be found using the diffraction grating formula: d*sin(θ) = m*λ, where d is the distance between grating lines (1/5000 cm), m is the order number (1 for first-order), and λ is the wavelength (632.8 nm). Solving for θ gives approximately 18.4 degrees.

Monochromatic Light from a He-Ne Laser λ\lambdaλ = 6328 Nm)is Incident on a Diffraction Grating Containing 5 000

Monochromatic Light from a He-Ne Laser $\lambda$ = 6328 Nm)is Incident on a Diffraction Grating Containing 5 000