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joelpimentel
07.04.2020 •
Physics
Light from an argon laser strikes a diffraction grating that has 5,139 grooves per centimeter. The central and first-order principal maxima are separated by 0.488 m on a wall 1.78 m from the grating. Determine the wavelength of the laser light.
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Ответ:
515.5 nm
Explanation:
To find the wavelength (λ) of the laser light we can use the following equation:
Where:
n: is the order of the principal maxima = 1
d: is the width of the groove = 1/N
N: is the number of grooves per length = 5139 grooves/cm
θ: is the angle made by the spectral line → tanθ = D/L
D: is the separation from the wall = 0.488 m
L: is the separation from the grating = 1.78 m
First, we have to find d and θ:
Now, we can calculate the wavelength of the laser light:
Therefore, the wavelength of the laser light is 515.5 nm.
I hope it helps you!
Ответ:
Explanation:
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