The Photoelectric Effect
Über den Vortrag
Der Vortrag „The Photoelectric Effect“ von Jared Rovny, PhD ist Bestandteil des Kurses „Electronic Structure“.
Quiz zum Vortrag
What was the surprising observation in regard to the photoelectric effect which led to the conclusion that light is composed of quantized packets of energy proportional to the frequency of light?
- Electrons were able to be released from a material only when more blue light was shone, regardless of the intensity of the light.
- Electrons were able to be released from a material only when a more red light was shone regardless of the intensity of the light.
- Electrons were able to be released from a material only when a more blue light was shone if the intensity of light was high enough.
- Electrons were able to be released from a material only when a more red light was shone, if the intensity of light was high enough.
- Electrons were able to be released from a material only when the intensity of light was high enough, regardless of the frequency of light.
Why couldn't red light, even with high intensities, eject photons from the conductor in the photoelectric effect experiment?
- The photons that constitute red light, each have too little energy to knock electrons out of the conductor.
- The wavelength of red light is much larger than the atomic size, therefore cannot interact much with the atoms of the conductor.
- The uncertainty principle shows that more red light cannot be used to effect electron orbitals.
- Red lights frequency is not in tune with the natural frequency of the conductors atoms. Hence, they could not resonate with each other.
- The frequency of red light is too low to cause abrupt changes to the atoms of the conductor that can result in the release of electrons.
What is the work function?
- The minimum energy required to release an electron from an atom
- The function is describing how much work an atom does when emitting light
- The work done to move an electron between orbitals to release a photon
- The function of energy which describes the type of photon released
- The amount of energy which an atom releases in the form of a photon when an electron changes orbitals
A photon of frequency f hits a material with work function ϕ. What is the speed of the released electron?
- √[2(hf - ϕ) / m]
- hf - ϕ
- K + ϕ
- 2(hf - ϕ) / m
- √[(hf - ϕ) / m]
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Dozent des Vortrages The Photoelectric Effect
Jared Rovny, PhD
Dr. Jared Rovny has been a Lecturer at Yale University in Connecticut, USA since 2013.
He obtained his PhD in Physics from Yale University in 2019. He was awarded the D. Allan Bromley Graduate Fellowship in Physics in 2019 and the Princeton Quantum Institute Postdoctoral Fellow in 2020.
Currently, he works with Yale's Center for Teaching and Learning at Yale University.
Due to his achievements, he earned the Yale College Prize Teaching Fellowship for his work in PHYS 171 (University Physics for the Life Sciences).
Within Lecturio, Dr. Rovny teaches courses on Physics.
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