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A typical CO2 laser produces infrared radiation in the range of 9000-11000 nm wavelength in pulses of 5 J and 500 ns duration.
(a) How many infrared photons per pulse are produced, assuming all the energy is produced at a wavelength of 10000 nm?
(b) What is the peak power of the laser in watts?
Light is an electromagnetic wave and travels at a speed of 3.00 x 10^8 m/s. The human eye is most sensitive to yellow-green light, that has a wavelength of 5.45 x 10^-7m. How you find the frequency of this light.
Two identical particles, each with a mass of 4.5 mg and a charge of 30 nC, are moving directly toward each other with equal speeds of 4.0 at an instant, How far apart will they be when closest to one another
A muon and an antimuon are moving in opposite directions with velocities of -0.4 c and 0.4 c, respectively. When they collide, they can annihilate each other and turn into two photons. Both muon and antimuon have a mass of 105.66 MeV/c2.
True false questions on physics
a solid aluminum ingot weighs 92 n in air.a what is its volume?b the ingot is suspended from a rope and totally
An insulated thermos contains 138.0 cm3 of hot coffee at a temperature of 80.0 °C. You put in 11.0 g of ice cube at its melting point to cool the coffee. What is the temperature of the coffee once the ice has melted and the system is in thermal eq..
A softball having a mass of 0.45 kg is pitched horizontally at spring with spring constant 78 N/m. how fast was the softball moving initially
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two parallel plates each of area 6.27 cm2 are separated by 3.60 mm. the space between the plates is filled with air. a
when a mass is suspended from a spring the equilibrium length is increaseb by 50 mm. the mass is then given a blow
Two loudspeakers emit sound waves along the x-axis. A listener in front of both speakers hears a maximum sound intensity, What is the phase difference between the speakers
Unpolarized light passes through two polaroid sheets. What fraction of the initial light is transmitted
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