Question

The element in an incandescent light bulb that releases light energy is _____. a phosphor mercury vapor a thin tungsten filament a thick tungsten filament

Answer 1

Answer: The correct answer is thin tungsten filament.

Step-by-step explanation:

Incandescent light bulb is a substance which converts electrical energy to light and heat energy and has fine filament made of metal.

These bulbs have fine filament to have the maximum resistance as we know that resistance is inversely proportional to the area of cross section of the wire.

Metal used in the filament is tungsten because it has the highest melting point of
`3422^oC`

Hence, the correct answer is thin tungsten filament.

Answer 2

The answer to this physics question would be 'a thin tungsten filament'. The element in an incandescent light bulb that releases light energy is a thin tungsten filament. All the other choices are not applicable as answers to this question.