In a photoelectric experiment for 4000 Å incident radiation, the potential difference to stop the ejection is 2 V. If the incident light is changed to 3000 Å, then the potential required to stop the ejection of electrons will be
(a) 2 V (b) Less than 2 V
(c) Zero (d) Greater than 2 V
(d) According to Einstein's photoelectric equation
Hence if decreases increases.