[halk green]

Initial conditions : Stable Cavities :i_angry_steaming:

Q1: Consider obviously the stable cavity shown on the accompanying diagram.if d/r2=1/2 Assuming the initial ray is a distance ro below the axis
.

a.how many round trips are required to obtain a repection ?
b . what is the maximum excursion of the path from the axis ?

Unlucky Laser Physics student:k_crying:

A laser physics student is instructed by his adviser to algin a Laser with a confocal resonator using two mirrors of nominal raduis of curvature R = 200 mm. unfortunately ,due manufacturing errors , the radii of curvature of the two mirrors are R1= R+ (dalta R) with (dalta R) = 3.0 mm. After spending unsuccessful nights in the lab trying to achieve laser action at the nominally confocal distance L=200 mm, the student finds that the laser works if the two mirrors are moved slightly closer or slightly farther than the confocal position.Explain this result and find the mirror spacing at wihich the laser starts working

daltaR = التغير في R

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