Ultraviolet light of wavelength $2271\: A^{\circ}$ from a $100\: W$ mercury source irradiates a photocell made of molybdenum metal. If the stopping potential is $-1.3\: V$,will the photocell respond to a high intensity $(10^{-5}W/m^2)$ red light of wavelength $632.8\: A^{\circ}$ produced by a He-Ne laser?

Question

$\begin {array} {1 1} (a)\;yes & \quad (b)\;no \\ (c)\;maybe & \quad (d)\;can’t\: be\: determined \end {array}$