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Rongeet Banerjee
- 45
- 6
- Homework Statement
- Is definition of Cathode defeated?
- Relevant Equations
- None
The cathode in the photoelectric effect refers to the negatively charged electrode in a vacuum tube or photoelectric cell. It is the electrode from which electrons are emitted when light of a certain frequency is shone on it.
The cathode is an essential component in the photoelectric effect as it is responsible for emitting electrons when light of a certain frequency, known as the threshold frequency, is incident on it. These electrons are then collected by the anode, creating an electric current.
Yes, the cathode is always negatively charged in the photoelectric effect. This is because in order for electrons to be emitted, the cathode must have a lower potential energy compared to the anode. This potential difference creates an electric field that accelerates the electrons towards the anode.
Yes, the cathode can be made of different materials in the photoelectric effect. However, the material must have a low work function, meaning it requires little energy for electrons to be emitted. This is necessary for the photoelectric effect to occur.
No, the cathode is not the only electrode involved in the photoelectric effect. The anode, which is the positively charged electrode, is also necessary for the effect to occur. It collects the emitted electrons and completes the circuit, allowing for the measurement of the electric current produced.