Q.4 A 25W bulb emits monochromatic yellow light of wavelength 570nm. Calculate the rate of emission of photons per second?
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Answer:
25nm
Explanation:
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Explanation:
Power = 25 Watts = 25 Joules /second λ = 0.57 μm energy in a photon = h c/^ Power = n* h c/^ where n = number of photons quanta emitted per second <= 25= n* 6.626 * 10-34 * 2.98* 108/0.57 * 10-6 => n = 7.218 * 10¹⁹ per second
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