It is found that yellow light does not eject photoelectrons from a metal. Is it advisable to try with orange light? With green light?
We know the famous mnemonic VIBGYOR (Violet-Indigo-Blue-Green-Yellow-Orange-Red) to remember visible light in increasing order of their wavelengths. It is given that (yellow light) does not cause photoelectric effect. This means that
and the energy supplied to the electron is smaller than the work function
and hence no electron will come out of the metal. Wavelength of orange light
is even greater than the wavelength of yellow light
and thus
. Therefore, Orange light also does not eject photoelectrons. Wavelength of green light
is smaller than the wavelength of yellow light
and thus green light may cause ejection of photoelectrons from a metal only if
.