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## Homework Statement

The following data was obtained upon using a double-slit experiment. Use this data to determine the wavelength of light being used to create the interference pattern. Do this in three different ways.

- The angle to the eight maximum is 1.12°

- The distance from the slits to the screen is 302 cm

- The distance from the first minimum to the fifth minimum is 2.95cm

- The distance between the slits is 0.025cm

## Homework Equations

## The Attempt at a Solution

My work is shown in this image: http://gyazo.com/b9625064b97100febb726a6f6a12236a

I believe I have interpreted the information correctly. I also believe methods 1 and 3 are correct as they were the most obvious. I have placed a series of question marks on method 2, which I am having trouble understanding. I don't believe they have given me sufficient information to solve this problem as is.

After I have 3 values for wavelength, I plan to average them out to get a final answer.

Does anyone have any insight to this? I seem to be missing a very important variable and I'm not sure how to go about it.