Find the number of photons emitted per second by a $25$ watt source of monochromatic light of wavelength $6600 \mathring A$. What is the photoelectric current assuming $3 \%$ efficiency for photoelectric effect?
Find the number of photons emitted per second by a $25$ watt source of monochromatic light of wavelength $6600 \mathring A$. What is the photoelectric current assuming $3 \%$ efficiency for photoelectric effect?
- A
$\frac{25}{2} \times 10^{19} , 0.4\,amp$
- B
$\frac{25}{4} \times 10^{19} , 6.2\,amp$
- C
$\frac{25}{2} \times 10^{19} , 0.8\,amp$
- D
None of these
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