The filament in a conventional incandescent light bulb is constructed from a thi

Question

The filament in a conventional incandescent light bulb is constructed from a thin, round tungsten wire that is
wrapped int double spiral . Consider a modified light bulb in which the diameter of the filament wire is half the
normal size, and the operating voltage of the light bulb is lowered as well so that the filament temperature is the
same as the conventional tungsten bulb (2500 C) . For each of the following statements compering 2 light
bulbs , indicate whether is true of false.

Question

THE SPECTRUM OF THE VISIBLE LIGHT EMITTED BY BOTH LIGHT BULBS IS THE SAME

True or false and why.

The emissivity of the conventional light bulb is higher that the modified light bulb

True or False and why.


The total power radiated by the modified bulb will be less than tthe conventional light bulb.


True or false and why.


The modified light bulb will have a longer life compared to the conventional bulb


True or false and why.

Explanation / Answer

true true false true

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