Work function of a metal is 2.51 eV. Its threshold frequency is

Q. The threshold frequency for a certain metal is $3.3\times {10}^{14}cycle/sec$. If incident light on the metal has a cut-off frequency $8.2\times {10}^{14}cycle/sec$, calculate the cut-off potential for the photoelectron.

Q. Work function of a metal is 2.51 eV. Its threshold frequency is

Q. Assertion :Photo sensitivity of a metal is high if its work function is small. Reason: Work function $=h{\nu }_0$ where ${\nu }_0$ is the threshold frequency.

Q. If the work function of a metal is $0.8275\text{eV}$. Its threshold frequency falls in the region of

Q. The work function of a metal is $3.31\times 1.6\times {10}^{-19}$ joule. Calculate its threshold frequency in hertz.