# Day 10 - Diffraction Gratings Note

```Diffraction Gratings
Sketch a diagram of an interference pattern produced using a diffraction
grating.
Compare and contrast this pattern with those produced using a single slit
and a double slit.
The wavelength of light can be measured from a diffraction pattern. The
measurements can become more accurate when the pattern is sharper.
This can be accomplished by increasing the number of slits.
Diffraction Grating: ________________________________________
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Line Spectrum: ____________________________________________
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Continuous Spectrum: ______________________________________
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Equation:
What are the equations for double slit interference?
How can these be adapted for diffraction gratings?
1. What are the angular positions of the first-order maxima for violet
light (450 nm) and red light (650 nm) when using a diffraction grating
with 5400 slits over 2.8 cm?
2. Which maximum occurs closes to the central axis if the diffraction
grating used has 12 678 lines in 2.40 cm: the second order red (730
nm) maximum, the third order violet (400 nm) maximum, or the
second order green (510 nm) maximum?
```