The ground state of hydrogen has two closely-spaced energy levels, where oneelectron is spinning up and the other is spinning down. This energy transition corresponds to releasing excess energy as a photon at what wavelength?
a. 21 centimeters
b. 21 millimeters
c. 21 meters
d. 22.2 centimeters
e. 22.2 millimeters
a
You might also like to view...
A website's ______ are the methods you will use to achieve your goals.
A. plans B. objectives C. targets D. purposes
A mover pushes a box of mass m = 56.0 kg along a horizontal floor a distance d = 2.50 m. The constant force exerted on the box by the mover makes an angle of 27.0° directed below the horizontal. Assume the floor is frictionless. If the work done by the mover is W = 200 J, what is the force exerted by the mover?
a. 89.8 N b. 549 N c. 616 N d. 176 N
A hospital patient has been given a sample of 131I , which has a half-life of 8.04 days. This sample is decaying at 5.9 times the acceptable level for exposure to the general public
How long must the patient wait for the decay rate of the sample to reach the acceptable level? A) 21 days B) 14 days C) 9.9 days D) 8.9 days
When at rest, a spacecraft has the same height as length. When moving at relativistic speeds in the direction of its length, which one of the following describes its length and height to an observer at rest?
a. Its length is decreased and its height is increased. b. Its length is decreased and its height is decreased. c. Its length is decreased and its height is unchanged. d. Its length is unchanged and its height is increased. e. Its length is increased and its height is decreased.