A helium-neon laser ($\lambda$ = 632.8 nm)is used to calibrate a diffraction grating.If the first-order maximum occurs at 20.5$\degree$,what is the line spacing,d? A)1.81 *10^-⁶ m B)1.00 *10^-⁵ m C)1.00 *10^-⁴ m D)1.31 *10^-⁶ m E)6.76 *10^-⁷ m

Question

Quizplus · Accepted Answer

The correct answer is A.The line spacing of a diffraction grating is given by the equation d = λ/sinθ, where λ is the wavelength of the light used and θ is the angle of the first-order maximum. In this case, λ = 632.8 nm and θ = 20.5°. Plugging these values into the equation, we get d = 1.81 × 10^-6 m.

A Helium-Neon Laser λ\lambdaλ = 6328 Nm)is Used to Calibrate a Diffraction Grating

A Helium-Neon Laser $\lambda$ = 6328 Nm)is Used to Calibrate a Diffraction Grating