A small gas laser of the type used in classrooms may radiate light at a power level of 2.0 mW. If the wavelength of the emitted light is 642. nm, how many photons are emitted per second?
What will be an ideal response?
6.5 × 1015
You might also like to view...
Graphical Analysis: Which of the following graphs represent an object at rest? (There could be more than one correct choice.)
A. graph a B. graph b C. graph c D. graph d E. graph e
How is the geometrical structure of the universe today related to the presence of matter in the universe? How is this related to the future history of the universe?
What will be an ideal response?
When the handle of a tuning fork is held solidly against a table, the sound becomes louder and the time that the fork keeps vibrating
A) becomes longer. B) becomes shorter. C) remains the same.
When car shock absorbers wear out and lose their damping ability, what is the resulting oscillating behavior?
a. underdamped b. critically damped c. overdamped d. hyperdamped