Short Answer TypeFind energy of each of the photons which correspond to light of frequency 3 x 1015 Hz.
Calcualte the energy of one mole of photons of radiation whose frequency is 5 x 1014Hz.
Long Answer TypeShort Answer TypeA 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.
Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is 5.6 x 1024, calculate the power of this laser.
Energy of one photon of light (E) = hv
Energy of n photon of light (En) = nhv
...(1)
Here, n = 5.6 x 1024; h = 6.626 x 10-34 Js;
Substituting the values in eq. (1), we have
Long Answer TypeNeon gas is generally used in the sign boards. If it emits strongly at 616 nm, calculate: (a) the frequency of emission, (b) distance travelled by this radiation in 30 s (c) energy of quantum and (d) number of quanta present if it produces 2 J of energy.
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