This experiment on the photoelectric effect was conducted using a mercury light source for its distinctwavelengths of light and a h/e apparatus that allowed us to control the electric potential across thecathode to anode distance in a vacuum tube where the photoelectrons were traveling. We...
题目 The work function for the photoelectric effect in potassium is 2.25 eV. For the case when light with a wavelength of 3.6 x 10-7 m falls on the potassium, the velocity of the fastest of the emitted electrons is ( ) 相关知识点: 试题来源: 解析 6.5X105 m/s 反馈 收藏 ...
Work functionis a key concept in physics that describes the minimum energy needed to remove an electron from a solid surface. It has important applications in various fields, such asthermionic emission, photoelectric effect, field emission, and surface science. In this article, we will explain wha...
The work function for the photoelectric effect in potassium is 2.25 eV. For the case when light with a wavelength of 3.6 x 10-7 m falls on the potassium, the velocity of the fastest of the emitted electrons is ( )A.2.3X103 m/sB.9.2X108 m/sC.7.4X106 m/sD.
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available to the emission current in thermo-electronic emission while bound-electons are actual electons absorbing photons.A new formula describing the work function in photoelectric effects is discussed,which gives a good explanation to the facts that temperature is not related to the work function....
The photons need a minimum threshold frequency (a minimum amount of energy) to free electrons and produce a photoelectric effect, known as the work function. In the example shown here, the violet photons have enough energy to knock out electrons, but the red photons don't. As Einstein ...
The work function for the photoelectric effect in potassium is 2.25 eV. For the case when light with a wavelength of 3.6 x 10-7 m falls on the potassium, the velocity of the fastest of the emitted electrons is () A、2.3X103 m/s B、7.4X106 m/s..
1. What is a work function? A work function is the minimum amount of energy required to remove an electron from the surface of a material. 2. How is work function measured? Work function is measured by using a device called a Kelvin probe, which uses the photoelectric effect to determine...
14 (a)Explain what is meant by the work function of a metal.*(b) Observations of the photoelectric effect support the particle theory of light.State one such observation and explain how it supports the particle theory of light. 相关知识点: ...