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| 1. |
Calculate the number of photons emitted in 10 hours by a 60 W sodium lamp? |
| Answer» E=hv, E=3.13×10^-19 power of lamp=60 watt, E=3.313×10^-19 photons emitted in one second=60×10^19/3.313=1.81×10^20" in 10 hours (1.81×10^20×3600×10)=6.5160×10^24 photons emitted | |