20. GO Light bulb 1 operates with a filament temperature of 2700 K whereas light bulb...

Question

Question

Answer 1

Answer #1

Power radiated by bulb1-

P coT A EO 1

Power radiated by bulb 2-

P2 EaT A2

Where e emissivity , $\sigma$ =Stefan-Boltzmann constant

Now both bulbs radiate same power i.e.-

PI P

EoT A1EoT A2

A1 T2 4 A2

2100 A1 2700 A2

A1 2401 6561 A2

Answer 2

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