Photoelectric effect experiment

In summary, Tony has a question about the photoelectric effect experiment and the trajectory of particles between plates A and B. The particles are negatively charged electrons and is attracted to the positively charged plate A, causing a change in trajectory. There is also a discussion about the design of cathode ray tubes.
  • #1
tonyza2006
3
0
Hi there,

I have this problem with this photoelectric effect experiment.

In the image of my attachment particulates will be ejected from C and move to D. The electric field(by A and B) will change the particulates trajectory to A, B or will not change this?

Thanks
Tony

PS: Sorry about my english.
 

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  • #2
Hi Tony! :smile:

(btw, we call them "particles" … "particulate" is usually an adjective :wink:)

the particles are negatively-charged electrons, so which way will they go? :smile:
 
  • #3
the negatively charged photoelectrons will move towards the positively charged plate A as unlike charges attract each other.
 
  • #4
I have a sneaking suspicion that cathode ray tubes are built with the deflection plates inside the glass for a good reason. What do you think?

DC
 

1. What is the photoelectric effect experiment?

The photoelectric effect experiment is an experiment first conducted by Heinrich Hertz in 1887 and later explained by Albert Einstein in 1905. It involves shining light on a metal surface and observing the emission of electrons from the surface. This experiment helped to confirm the particle nature of light and led to the development of quantum mechanics.

2. How does the photoelectric effect experiment work?

In the photoelectric effect experiment, a metal surface is illuminated with a beam of light. The light is made up of individual packets of energy called photons. When the photons hit the metal surface, they transfer their energy to the electrons in the metal. If the energy of the photon is high enough, it can overcome the binding energy of the electrons and cause them to be emitted from the metal surface.

3. What is the significance of the photoelectric effect experiment?

The photoelectric effect experiment is significant because it helped to confirm the particle nature of light and supported the idea that light is made up of discrete packets of energy. This experiment also led to the development of the concept of the photon and the understanding of the quantized nature of energy. It also has practical applications in technologies such as solar cells and photoelectric sensors.

4. What are the key components of the photoelectric effect experiment?

The key components of the photoelectric effect experiment include a metal surface, a source of light (such as a laser), and a collecting plate to measure the emitted electrons. The metal surface is typically made of a material such as zinc or cesium, which have low work functions, making it easier for electrons to be emitted. The collecting plate is connected to an ammeter to measure the current of the emitted electrons.

5. How did the photoelectric effect experiment contribute to the development of quantum mechanics?

The photoelectric effect experiment was one of the key experiments that led to the development of quantum mechanics. It showed that light behaves as both a wave and a particle, and that the energy of light is quantized. This led to the development of the concept of the photon and the understanding of the quantized nature of energy, which are fundamental principles of quantum mechanics.

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