If the wavelength of light in an experiment on photoelectric effect is doubled.

if wavelength of the light is doubled then the photons emitted energy becomes half.

Energy of photon = hv =


where h is plank’s constant and ν is the frequency which is where the c is the speed of light and{displaystyle lambda }
{displaystyle lambda }
λ (Lambda) is wavelength.


the stopping potential is the potential which is required to stop the max kinetic energy electron. if the energy of photon is decreased


the stopping potential also decreases.

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