solutions

IB Physics: solutions

1. A filament lamp gives out light of average wavelength 600nm when connected to a 220V supply. The current flowing through the filament is 5A (rms). If 3x1020 photons are emitted per second calculate the % of the energy delivered to the lamp that is converted into light. Solution 2. The graph below was taken from the PHET photoelectric simulation. Use the graph to find


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