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A 190 MW laser pulse is focused with a lens to a diameter of 2.3 μm.
(a) What is the intensity of the laser beam at this diameter? Remember that the power (and intensity) of the laser beam is concentrated in a circular spot, and be careful with your units. 1 μm = 10-6m. You are going to get some remarkably large values for this problem. Laser beams can be tremendously powerful, which is why there are safety concerns.
(b) What is the amplitude of the electric field when the beam is focused at this diameter?
To push a piece of heavy furniture across the carpet usually takesmore force to get it moving than it takes to keep it moving, this is because:
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Fromt= 0 tot= 4.39 min, a man stands still, and fromt= 4.39 mintot= 8.78 min, he walks briskly in a straight line at a constant speed of2.01 m/s. What are(a)his average velocityvavgand(b)his average accelerationaavgin the time interval 1.00 min to5.3..
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The great gymnast Nadia Comaneci may have had a vertical leap as high as 1.42 m. Calculate the "takeoff" speed
A 5-kilogram object initially slides with speed vo in a hollowfrictionless pipe. The end of the pipe contains two springs. one nested inside the other, Calculate the spring constant for the inner spring
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