1. With what kind of “light” (e-m radiation) can we excite electrons to very high energy states, from which they will fall down in several steps – thereby making a material fluoresce in visible light? a. microwaves. b. sub-millimeter waves. c. radio waves. d. IR. e. UV. 2. Electrons inside elements can be in certain, well-defined excited states (quantum levels). When they leave such a state to a lower energy state, the frequency f of the “light” (electromagnetic radiation) emitted is related to the energy difference ΔE between such two states as: a.an undefined quantity. b. the same as a black-body emitter. c. the same as a gravitational field. d. ΔE = h · f , where h is Planck’s constant. e. related via the equation c = c2 3. About a decade later, using his oil droplet experiment, Millikan was able to find the smallest possible charge on such droplets, which he interpreted as the charge of a single electron. With that and the m/e ratio above, he was able to ... a. calculate the electron’s mass. b. measure the distance to the Sun, more accurately. c. measure the speed of light. d. show that there are electric currents.
1. With what kind of “light” (e-m radiation) can we excite electrons to very high energy states, from which they will fall down in several steps – thereby making a material fluoresce in visible light? a. microwaves. b. sub-millimeter waves. c. radio waves. d. IR. e. UV. 2. Electrons inside elements can be in certain, well-defined excited states (quantum levels). When they leave such a state to a lower energy state, the frequency f of the “light” (electromagnetic radiation) emitted is related to the energy difference ΔE between such two states as: a.an undefined quantity. b. the same as a black-body emitter. c. the same as a gravitational field. d. ΔE = h · f , where h is Planck’s constant. e. related via the equation c = c2 3. About a decade later, using his oil droplet experiment, Millikan was able to find the smallest possible charge on such droplets, which he interpreted as the charge of a single electron. With that and the m/e ratio above, he was able to ... a. calculate the electron’s mass. b. measure the distance to the Sun, more accurately. c. measure the speed of light. d. show that there are electric currents.
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter41: Atomic Physics
Section: Chapter Questions
Problem 10P
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1. With what kind of “light” (e-m radiation ) can we excite electrons to very high energy states, from which they will fall down in several steps – thereby making a material fluoresce in visible light?
a. microwaves.
b. sub-millimeter waves.
c. radio waves.
d. IR.
e. UV.
2. Electrons inside elements can be in certain, well-defined excited states (quantum levels). When they leave such a state to a lower energy state, the frequency f of the “light” (electromagnetic radiation) emitted is related to the energy difference ΔE between such two states as:
a.an undefined quantity.
b. the same as a black-body emitter.c. the same as a gravitational field.
d. ΔE = h · f , where h is Planck’s constant.
e. related via the equation c = c2
3.
About a decade later, using his oil droplet experiment, Millikan was able to find the smallest possible charge on such droplets, which he interpreted as the charge of a single electron. With that and the m/e ratio above, he was able to ...
a. calculate the electron’s mass.
b. measure the distance to the Sun, more accurately.c. measure the speed of light .
d. show that there are electric currents.
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