Measurement of the wavelength of monochromatic light

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7 Terms

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<p>Label This Diagram</p>

Label This Diagram

a - laser

b - diffraction grating

c - screen

d - n = 0

e - n = 1

f - n = 2

g - n = 3

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<p>Method • 1</p>

Method • 1

  • For each value of n, calculate angle using tan(theta) = y/x

  • Calculate wavelength

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Method • 2

  • Repeat previous steps for every value of n

  • Calculate the average wavelength

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Precautions • 1

Ensure grating is perpendicular to beam

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Precautions • 2

Ensure screen is perpendicular to screen

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Label This Formula

Diffraction Grating

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What page of the log tables can you find the Diffraction grating Formula?

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