What does increasing the intensity of light mean?

Increasing the light intensity (photon energy per second per unit area) increases the rate at which electrons leave the metal, and the electrons have more kinetic energy. • Changing the frequency of the light while keeping the intensity constant should not change the rate of electron emission.

How does intensity relate to number of photons?

In the particle model of light, a higher intensity (brighter light) means more photons. If we have more photons hitting the surface of the metal every second, as we would if we increase the intensity of the light, then we will be ejecting more electrons every second.

How does intensity of light affect frequency?

So this is one way in which you could say that the intensity does increase with frequency. If you have two light beams at different frequencies but with the same number of photons per second, the higher frequency light will have more energy in it’s light beam.

Why does current increase when light intensity increases?

Now, if you increase the intensity of the light, you essentially increase the number of photons per unit time. As long as no nonlinearities are introduced, the relative charge yield of #electrons/photon remains constant and therefore the current increases with light intensity.

Does intensity of light increase energy?

Here you can see that nothing is dependant on light intensity because the intensity is essentially the number of photons and does not increase nor decrease the energy of a single photon, therefore has no effect on the energy of an electron emitted.

What is intensity of light in terms of photons?

Intensity is the total amount of energy falling on (or going through) a surface/region per unit area A per unit time t and therefore measured in J/(m2s). For monochromatic radiation, the total energy emitted equals the number of photons n times the energy of one photon, hν. Hence intensity I is given by I=hnνAt.

Why does current increase when intensity of light increases?

Does increasing frequency increase intensity of light?

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.

What is the effect of increasing light?

Increasing light causes an increase in the photosynthetic rate most likely due to light’s stimulatory effect on Photosystem II of C. reinhardtii.