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                                    Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelength of sodium light is 662 nm.(Given that h=6.62×10−34 J s) | 
                            
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Answer»  Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelength of sodium light is 662 nm.  | 
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