Determine the angle theta

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Reference no: EM13687566

Here is the problem which I am struggling on, please help me!

Problem: Determine the angle theta¸ (in degrees) if the two positions of the first order spectral line are 38.0 cm and 62.0 cm. Assume the distance from the diffraction grating to the slit is 55 cm.

I need help for the above question and thanks in advance.

Reference no: EM13687566

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