A beam of light falling on a metal surface is causing electrons to be ejected from the surface. If we now double the frequency of the light, which of the following statements are correct? (There could be more than one correct choice.)
A) The kinetic energy of the ejected electrons doubles.
B) The speed of the ejected electrons doubles.
C) The number of electrons ejected per second doubles.
D) Twice as many photons hit the metal surface as before.
E) None of the above things occur.
E
You might also like to view...
Series/Parallel Circuits: What is the magnitude of the potential difference between points A and C for the circuit shown in the figure? The battery is ideal, and all the numbers are accurate to two significant figures.
A. 6.0 V B. 4.0 V C. 3.0 V D. 2.0 V
When you stand in front of a convex mirror, the image you see is
A. real and inverted. B. real and upright. C. virtual and inverted. D. virtual and upright. E. real and inverted if your distance from the mirror is greater than two focal lengths.
Which of the following is an example of a physical change?
A) water boiling and being converted into steam B) water being electrolyzed and being converted in hydrogen and oxygen C) iron metal reacting with oxygen to form rust D) a candy bar being digested by a student E) charcoal being converted into ash
In a meandering river, erosion is most notable on
A) the outer side of the meander. B) the inner side of a meander. C) both sides of a meander. D) the bottom of the stream channel.