Please answer with explanation/ drawing!! Link to 1st and 2nd part posted below.

Question

Please answer with explanation/ drawing!!

Link to 1st and 2nd part posted below.

http://phet.colorado.edu/en/simulation/wave-interference

3. Light Wave Diffraction (Double Slit)

Reset the light waves simulation and show the screen and intensity graph. Add a 2-slit barrier to the simulation and allow the graphs to be formed. Observe the interference pattern created when the characteristics of the simulation are adjusted. You may have to adjust amplitude when other elements of the simulation are changed to observe the graph. Sketch the intensity graph to support your response.

1. What affect does larger amplitude have on the maxima separation in the interference pattern?

2. What affect does a shorter wavelength have on the maxima separation in the interference pattern?

3. What affect does a larger barrier-to-screen distance have on the maxima separation in the interference pattern?

4. What affect does a smaller slit width have on the maxim separation in the interference pattern?

5. What affect does a smaller slit separation have on the maxima separation in the interference pattern?

Explanation / Answer

so seperation = lambda L/d

1) doesnt depend on amplitude so doesnt change

2) decreasing lambda makes the sepeartion smaller since lambda is in numerator

3) making L smaller, makes y smaller

4) doesnt depend on slit width so no change

5) smaller d means bigger sepeartion

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