Double-Slit sin (2 theta) help?

AI Thread Summary
The discussion revolves around a physics problem related to the double-slit experiment, specifically involving the calculation of wavelength and lateral displacement using the angle of the second-order bright fringe. The user is confused about the relevance of sin(2 theta) in solving the problem and seeks clarification on its application. They mention being new to trigonometry and express uncertainty about the problem's requirements. The user also indicates they are transitioning to a more appropriate forum for physics homework. Overall, the conversation highlights the challenges faced by students when integrating trigonometric concepts into physics problems.
MadMatt
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I'm in physics I and only in Trig for the first time this year (Jr in HS).
I do not remember sin (2 theta) in any previous lessons.
I need in help in the following problem using it.

In a double-slit experiment with monochromatic light and a screen at a distance of 1.50 , the angle between the second-order bright fringe and the central maximum is 0.0230 rad. If the separation distance of the slits is 0.0350 mm, what are (a) the wavelength and color of the light and (b) the lateral displacement of the fringe.

I am so confused with the question. I'm not even sure i need the sin (2 theta) in here. Any help will be appreciated.

I am new to the site (found in a google search). So if this is the wrong forum, I appologize.
 
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I'm moving this to the physics homework forum.
 
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