Ex) Calculate the distance between two
slits in a Double Slit Experiment if the
wavelength of the light used is is 5 x 10^{-7} m and the distance between the
central maximum and the first order bright line is 2 x 10^{-2} m. The distance from the slits to
the screen is 4 meters.

λ/d = x/L

(5 x 10^{-7} m)/d = (2 x 10^{-2} m)/4 m

Answer d = 1 x 10^{-4} m

Question: If they give you d, L and x and asked you to find the COLOR of the
light used, What would you do? Where would you go to find the color?

Answer:

1. Solve for
λ use Young's Equation

2. Use 3 x 10^{8} m/s = fλ
to find the colors frequency

3. Look up the color on page 2 Ref.

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