The key process of a laser is
a. stimulated emission.
b. Bremsstrahlung.
c. electron diffraction.
d. microwave absorption.
a
You might also like to view...
When a ray of light passes obliquely from one medium to another, which of the following changes?
A) direction of travel B) speed, direction of travel, but not wavelength C) wavelength D) wavelength, speed, & direction of travel E) speed
What is the quark composition of a ?°?
A) uud B) uus C) uds D) uss E) udd
Air is flowing through a rocket nozzle. Inside the rocket the air has a density of 5.25 kg/m3 and a speed of 1.20 m/s
The interior diameter of the rocket is 15.0 cm. At the nozzle exit, the diameter is 2.50 cm and the density is 1.29 kg/m3. What is the speed of the air when it leaves the nozzle? A) 176 m/s B) 123 m/s C) 88.0 m/s D) 45.7 m/s E) 29.3 m/s
A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = -5.5 N/C, Ey = Ez = 0 . If the position and velocity of the particle at t = 0 are given by x = y = z = 0 and vx = 50 m/s, vy = vz = 0, what is the distance from the origin to the particle at t = 2.0 s?
a. 60 m b. 28 m c. 44 m d. 12 m e. 88 m