Question

BYS 243 Exam 3 Section B: 2 points each The following problems are worth 2 points each. Please start with one of the equations in the toolbox, show complete work with all algebraic steps and explain your reasening. No werk, no credit. A pulsed laser fires a 1000 MW pulse that has a duration of 200 ns at a 10.00mg objected suspended by a very fine. 4 cm long fiber. Assume that the object hangs vertically. If the radiation is completely absorbed, find the maximum deflection angle of this pendulum 2wu s 2 A piece of paper between two rectangular glass plates forms a thin film, as shown below. Maxima and minima of interference are observed in the reflected light at 500am. A) describe quantitatively and qualitatively the observed pattern b)The third minimum of interference occurs at a horizontal distance of 3 mm from the apex A Find the angle a, Ap: wwme 2nd:m 7.5 n 3 0.014

Answer 1

1. The Force due to the radiation is,

1000 x 106 F = F = 3 x 108 3.33 N C

Let the pendulum gets suspended at an angle $\theta$. At that angle, the magnetic force, Tension T and this force is balanced at equilibrium. We can write the equations as,

Tcost mg T sine F

From both the equations, we can write,

F 0=tan mg

Substituting values we get,

3.33 0 tan 89.9 10 x 10-3 x 10-3 x 9.81

This will be the maximum deflection.