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11.Dual Nature of Radiation and matter
easy
A radio transmitter operates at a frequency of $880 \,kHz$ and a power of $10\,kW$. The number of photons emitted per second are
A
$1.72 \times {10^{31}}$
B
$1327 \times {10^{34}}$
C
$13.27 \times {10^{34}}$
D
$0.075 \times {10^{ - 34}}$
(AIPMT-1990)
Solution
(a) Number of photons emitted per second
$n = \frac{p}{{h\nu }} = \frac{{10 \times {{10}^3}}}{{6.6 \times {{10}^{ – 34}} \times 880 \times {{10}^3}}} = 1.72 \times {10^{31}}$
Standard 12
Physics
