Calculating Third-Order Maximum Angle for Grating

Thread starter rachiebaby17
Start date Apr 29, 2009
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Angle Grating Maximum

AI Thread Summary

To calculate the third-order maximum angle for a grating with 7000 lines over 2.67 cm illuminated by a mercury vapor lamp, the relevant diffraction equation is d sin(θ) = mλ, where d is the grating spacing, m is the order of the maximum, and λ is the wavelength of light. The grating spacing (d) is determined by dividing the total width by the number of lines, resulting in d = 2.67 cm / 7000 lines. For the green line at 546 nm, substituting the values into the equation for m = 3 will yield the angle θ. The solution requires careful calculation to find the expected angle for the third-order maximum.

Apr 29, 2009

rachiebaby17

Homework Statement

A grating has exactly 7000 lines uniformly spaced over 2.67 cm and is illuminated by light from a mercury vapor discharge lamp. What is the expected angle for the third-order maximum of the green line ( = 546 nm)?

Homework Equations

The Attempt at a Solution

no idea :(

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Apr 30, 2009

rl.bhat

Homework Helper

Try to find out the relevant equation for diffraction grating.

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