Dadface said:What attempt have you made?
Dadface said:As rockfreak advised write down the equation.Next rearrange it to make V the subject of the equation and then compare what you have to the equation of a straight line.By comparison you should be able to identify what the gradient of the graph represent and what the intercepts on the y and the x-axis represent.
The photoelectric effect is the phenomenon where electrons are emitted from a metal surface when it is exposed to light of a certain frequency. This effect was first discovered by Albert Einstein in 1905 and is a fundamental principle in quantum mechanics.
When light of a certain frequency, known as the threshold frequency, hits a metal surface, it transfers its energy to the electrons in the metal. If the energy of the light is greater than the work function of the metal, the electrons will have enough energy to overcome the attractive forces of the metal and be emitted as photoelectrons.
According to the photoelectric effect equation, the kinetic energy of the emitted electrons is directly proportional to the frequency of the incident light. This means that as the frequency of the light increases, the kinetic energy of the emitted electrons also increases.
The cutoff frequency is the minimum frequency of light required to cause the photoelectric effect. If the frequency of the incident light is below the cutoff frequency, no electrons will be emitted regardless of the intensity of the light. The cutoff frequency is determined by the work function of the metal.
The photoelectric effect has many practical applications, such as in solar cells, photodiodes, and photomultiplier tubes. These technologies utilize the photoelectric effect to convert light energy into electrical energy, making them crucial in fields such as renewable energy, telecommunications, and medical imaging.