Find the frequency of light which ejects electron from a metal surface fully stopped by a retarding potential of $3 V$ . The photoelectric effect begins in this metal at a frequency of $6 \times 10^{15} H z$ :

Question

Find the frequency of light which ejects electron from a metal surface fully stopped by a retarding potential of

3 V

. The photoelectric effect begins in this metal at a frequency of

6 \times 10^{15} H z

:

Toppr Admin · Accepted Answer

According to Einstein-s photoelectric equation-E-k - hv - W-If -V-s- is retarding or stopping potential and -v-0- the threshold frequency- then above equation becomes-eV-s - hv - hv-0-or -hv - eV-s - hv-0-or -v - -dfrac-eV-s-h- - v-0-Hence- -e - 1-6 -times 10-10- coulomb- -V-s - 3V- and -v-0 - 6 -times 10-14- Hz-Required frequency-v - -dfrac-1-6 -times 10-10- -times 3-6-63 -times 10-34- - - 6 -times 10-14- 7-24 -times 10-14- - 6 -times 10-14- 13-24 -times 10-14- Hz- 1-324 -times 10-15- Hz-

Find the frequency of light which ejects electron from a metal surface. Fully stopped by a retarding potential of $$3V$$, the photoelectric effect begins in this metal at a frequency of $$6 \times 10^{14} Hz$$. Find the work function for this metal.