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15 questions
A particle of light is called a...
Photoelectron
Photon
Proton
Electron
The only way to increase the number of photoelectrons emitted is by increasing the _________ of the light
Intensity
Wavelength
Frequency
Energy
What color of light has the greatest energy per photon?
Red
Green
Blue
Violet
The energy of photoelectrons emitted from a metal surface can be increased by
using light of higher frequency.
using light of longer wavelength.
using light of higher intensity.
using monochromatic, polarized light.
What is the best description of 'threshold frequency'?
The minimum energy needed for electrons to escape a surface.
The maximum kinetic energy that an emitted electron has.
The minimum frequency of a photon that will cause an electron to be emitted.
The frequency that an emitted electron will have.
A metal with a work function of 3.5 eV is exposed to photons with an energy of 3.7 eV. What is the maximum kinetic energy of the emitted photoelectrons?
0.2 eV
0.9 eV
1.1 eV
7.7 eV
Use the graph to find the threshold frequency.
−12×10-19 Hz
0 Hz
2×1015 Hz
4×1015 Hz
What is the energy of a photon with a frequency of 5x1014 Hz? (you need to do calculation. You have enough time) h=6.6x10-34 J/Hz
2.5x10-19 J
3.0x10-19 J
3.3x10-19 J
4.5x10-19 J
The SI unit of frequency is the __________.
meter
second
hertz
meter per second
When light of specific frequencies is shined on a surface, electrons are ejected from the surface. This is the idea behind...
Quantization of Energy
Photoelectric Effect
Compton Effect
deBroglie Waves
Uncertainty Principle
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