What will happen to photo current IF frequency of incident light is doubled keeping intensity constant?
The maximum kinetic energy of the photoelectrons is double. Since frequency of light solurce is double, the energy carried by each photon will be doubled. Hence intensity will be doubled even if number of photons remains constant. Hence saturation current is constant.
What is the effect of frequency and intensity on photoelectric effect?
In the explanation of photoelectric effect it is written that intensity and frequency of radiation have different results i.e. higher intensity means greater number of emitted photoelectrons and higher frequency means greater kinetic energy of emitted photoelectrons.
How does frequency affect light intensity?
If the only thing one changes is the frequency of the photons, then doubling the frequency will double the intensity. Alternately, doubling only the emission rate, or focusing the photons to hit half the area will also double the intensity.
How does light intensity affect Photo current?
The number of electrons emitted per second is observed to be directly proportional to the intensity of light. Below this threshold frequency, the intensity of light has no effect on the photocurrent! In fact, there is no photocurrent at all, howsoever high the intensity of light is.
What is the effect of light current when the frequency of incident light increases?
Since the current is proportional to the average velocity of the electrons, the current will increase if the average velocity of the electrons is greater. Therefore, if we increase the frequency of the incident light, the photoelectric current will increase.
What is the difference between intensity and frequency of light?
Answer: Light is electromagnetic radiation and exhbits dual nature, wave and particle. if you consider light is wave, intensity is related to light radiation energy and frequency is the number of waves per second. In particle nature, intensity is related to number of photons in the radiation.
What happens to frequency when intensity increases?
because if we increase frequency of light it will only increase in energy of single photon but if we increase intensity it only increase number of photon per unit area so increase in intensity does not lead to increase in frequency..
Why do photons have different frequencies?
All photons have the same velocity due to the fact that other than the frequencies the wavelengths vary as well. A photon with half the frequency of another photon will have twice the wavelength and thus the same velocity. That’s why photons with different frequencies will arrive at the same time.
How does energy of different waves vary with frequency?
The higher the amplitude, the higher the energy. To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.
What is the difference between frequency of light and intensity of light?
What happens if the intensity of light increases?
In photoelectric effect, on increasing the intensity of light, both the number of electrons emitted and kinetic energy of each of them get increased but photoelectric current remains unchanged.
How does the photo-electric effect depend upon the intensity of the incident light?
The intensity of the incident light is slowly increased. As the intensity of incident light increases the photoelectric current increases. This shows that the photo-electric effect depends upon the intensity of the incident light (radiation).
What happens to the color of light when frequency is increased?
Increase in frequency, is seen as a change in color. Note that, when the intensity of the incident radiation is increased, the energy of the photoelectrons emitted does not increase. However, the number of photoelectrons emitted does increase.
What is the difference between frequency and intensity of light?
NOTE : Increase in intensity means increase in the number of photons or constituent particles. But increase in frequency means increase in the energy possessed by these particles. In the case of visible light, increase in intensity is seen as increase in brightness.
How does frequency affect the rate of arrival of photons?
If intensity is kept constant, the factor that affects rate of arrival of photon is solely the energy of photon. If frequency is increased, the energy of photons with increase and given that rate of arrival is inversely proportional to the energy, the amount of photon arriving the surface per unit time will decrease.
https://www.youtube.com/watch?v=xufLi8jfhwE