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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?
A(n) 78 g particle moving with aninitial speed of 24 m/s in the positive xdirection strikes and sticks to a(n) 82 gparticle moving with 150 m/s in the positivey direction. How much kinetic energy is lost in this collision? Answer inunits of J.
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Light with a frequency of 2.95 x 1015 Hz ejects electrons from the surface of calcium, which has a work function of 2.87 eV. What is the minimum de Broglie wavelength of the ejected electrons?
two identical objects are placed in a room at 24deg c. object 1 has a temperature of 95deg c and object 2 has a
To start a car engine, the car battery moves N = 3.25 × 1021 electrons through the starter motor. Calculate the magnitude of the charged moved
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A rock is thrown from the edge of a cliff to the ground 24.0 m below. The rock has an initial velocity of 13.5 m/s, directed 24.0° above the horizontal. Find the velocity of the rock just before it strikes the ground
Two equally charged particles are held 3.5 x 103 m apart and then released from rest. What is the magnitude of the charge of each particle
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A cork 2.0 cm in radius is used to close one end of a tube whose other end is connected to a vacuum pump. How much force would be needed to pull the cork out
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