- #1

- 15

- 0

tan(theta) = y/D

asin(theta) = p * wavelength

I know that I'm trying to solve for a, and that asin(theta) = 11.5, but I feel like I don't know enough information to solve the problem. Could someone point me in the right direction?

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- Thread starter singinglupine
- Start date

- #1

- 15

- 0

tan(theta) = y/D

asin(theta) = p * wavelength

I know that I'm trying to solve for a, and that asin(theta) = 11.5, but I feel like I don't know enough information to solve the problem. Could someone point me in the right direction?

- #2

Delphi51

Homework Helper

- 3,407

- 11

a*sin(11.5 mrad) = p*471 nm.

Be sure to get rid of the milli and the nano.

There is a little problem with that formula - it gives the angles for the minima whereas there is a maximum at θ = 0, so you'll have to do a couple of calculations perhaps for p = 1 and p = 2 to get a difference in angle between two minima.

- #3

- 15

- 0

Ah thanks. :)

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