Photoelectric Effect: A photocathode having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 3.4 eV. What is maximum kinetic energy of the photoelectrons produced?(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 1.6 × 10-19 J
B. 3.8 × 10-19 J
C. 4.4 × 10-19 J
D. 4.9 × 10-19 J
E. 5.4 × 10-19 J
Answer: A
You might also like to view...
The diffusion of atoms of similar size depends upon the presence of _____________.
Fill in the blank(s) with the appropriate word(s).
Contrast Aristotle's predictions concerning free-falling bodies with Galileo's predictions
What will be an ideal response?
The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. This refers to the idea that
A) luminous matter emits white light, much like the light reflected from icebergs. B) black holes are much more interesting than ordinary stars that give off light. C) dark matter represents much more mass and extends much further from the galactic center than the visible stars of the Milky Way. D) the luminous matter of the Milky Way is essentially floating on the surface of a great sea of dark matter.
If an astronaut takes an object to the moon the following is true (choose only one)
A. both the mass and the weight of the object will change. B. both the mass and the weight of the object will be the same. C. the weight will change but the mass will be the same. D. the mass will change but the weight will be the same.