• Subject:

...

• Topic:

...

If the work function of a metal is $\text{'}\mathrm{\varphi }\text{'}$ and the frequency of the incident light is '$\nu$', there is no emission of photoelectron if
(a) $\mathrm{v}<\frac{\mathrm{\varphi }}{\mathrm{h}}$                    (b) $\mathrm{v}=\frac{\mathrm{\varphi }}{\mathrm{h}}$
(c) $\mathrm{v}>\frac{\mathrm{\varphi }}{\mathrm{h}}$                    (d) $\mathrm{v}>=\frac{\mathrm{\varphi }}{\mathrm{h}}$