EMS Review
Failure of Classical Mechanics / Photoelectric Effect
de Broglie's
Wave Particle Duality
100
What type of relationship do energy and frequency have?
direct relationship
100
TRUE or FALSE:
Blackbody radiators emit radiation at all wavelengths.
False
100
Smaller objects will give off __________ wavelengths
large
100
How do light and matter behave?
Wave & particle
200
Compared to blue light, Infrared radiation has longer or shorter wavelengths?
Longer wavelengths
200
TRUE or FALSE:
Electrons can be ejected from a metal if they are above the minimum frequency threshold.
TRUE
200
Larger objects will give off __________ wavelengths
small
200
What experiment led to believing light behaves a wave?
Double Slit Experiment
300
How do X-rays impact matter?
excite core electrons
300
The work function of a silver surface is 4.73 eV. Two photons of 2.5 eV each hit the silver.
Are electrons ejected?
No, nothing happens
300
According to de Broglie’s equation, wavelength and frequency have a ______ relationship
indirect
300
Which of the following experiments most directly supports de Broglie’s hypothesis of the wave nature of matter?
a) Electron diffraction by a crystal
b) The emission spectrum from the hydrogen atom
c) The photoelectric effect
d) Blackbody radiation
a) Electron diffraction by a crystal
400
Order the EMS in DECREASING FREQUENCY.
Gamma, X-Ray, UV, Visible, Infrared, Microwaves, Radio waves
400
The work function of a silver surface is 4.73 eV. One photons of 5.73 eV hits the silver.
Are electrons ejected?
Yes, with 1 eV kinetic energy
400
Which object will give off the smallest wavelength?
a) marble
b) bowling ball
c) planet
d) proton
C) planet
400
Name an experiment/concept that proved light behaves as a particle.
Blackbody radiators
Photoelectric Effect
Hydrogen Emission Spectra
500
What is the frequency of yellow light with a wavelength of 600 nm?
5 x 1014 HZ
500
How much kinetic energy would an electron have if two photons with 2.3 eV hit a metal with a work function of 1.0 eV?
1.3
500
Which object will give off the largest wavelength?
a) meters
b) kilometers
c) nanometers
d) picometers
D) picometers
500
Light propagates in
a) Electric fields
b) Magnetic fields
c) Both electric and magnetic fields
d) Neither magnetic nor electric fields
C