Two radiations with photon energies 0.9 eV and 3.3 eV respectively are falling on a metallic surface successively. If the work function of the metal is 0.6 eV, then the ratio of maximum speeds of emitted electrons will be ………
(a) 1 : 4
(b) 1 : 3
(c) 1 : 1
(d) 1 : 9
