The energy of a photon depends on its
A) speed.
B) frequency.
C) amplitude.
D) all of the above
E) none of the above
Question 2
A laser cannot emit more energy than is put into it. But in instances where stored energy can be released in a very short time, the laser
A) puts out more energy than is put into it.
B) has a greater power output than power input.
C) both of these
D) neither of these