The threshold wavelength for photoelectric emission from a metal is $\lambda_0$. When light of wavelength $\lambda < \lambda_0$ falls on it, the maximum kinetic energy of emitted photoelectrons is:
- A$hc\left(\frac{\lambda_0 - \lambda}{\lambda \lambda_0}\right)$
- B$hc(\lambda_0 - \lambda)$
- C$\frac{hc}{\lambda_0 - \lambda}$
- D$hc\left(\frac{1}{\lambda_0} + \frac{1}{\lambda}\right)$