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Q1. The yellow light from a helium discharge tube has a wavelength of 587.50. When this light illuminates a certain diffraction grating it produces a first-order principal maximum at an angle of 1.050.

Determine the number of lines per centimeter on the grating.

Q2. An object in equilibrium has three forces exerted on it. A(n) 31 N force acts at 79.6?, and a(n) 53 N force acts at 57.6?.

What is the direction of the third force? (Consider all angles to be measured counter- clockwise from the positive x-axis.)

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Category:- Physics
Reference No.:- M9160611

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