2006-11-02 10:26:35 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The light bulb uses energy and the energy after a while get hot. If you touch 650 watt or higher it will burn out like that, because the chemical in the bulb are keep the filament on the wire because it get way too hot. The Chemicals get use to your body heat and cool down real fast. It leaves a real cool black/grey bump on it but those bulb cost 20$$ each. They are make for lights that need to be on for a while or need to last for a long time, light street lights.
2006-11-04 16:16:37 · answer #1 · answered by ♥Confused♥ 4 · 0⤊ 0⤋
Take a 100 Watt light bulb about 30 % of that energy is light the rest is heat.
2006-11-02 11:48:21 · answer #2 · answered by JOHNNIE B 7 · 0⤊ 1⤋
When electrical current flows through theoutlet to the filament inside the bulb, the copper or filament disperses the excess heat produced by the electrical current. since glass is a conductor of heat, the bulb becomes hot eventually.
2006-11-02 11:09:30 · answer #3 · answered by dunce002917 2 · 0⤊ 1⤋
Because we haven't been able to create a light bulb where all the power it consumes can be transfered into light. Some of the power used is converted into heat.
2006-11-02 10:49:34 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Electrical energy heats the filiment. This causes the filiment to glow: changing the electrical energy to heat energy and then to light. Heat continual disipates through the air in thelight bulb and heating it up and some of that heat is conducted into the glass making up the bulb.
2006-11-02 10:32:41 · answer #5 · answered by Answergirl 5 · 0⤊ 1⤋
Radiation from the filament heats up the bulb.
2006-11-02 10:31:47 · answer #6 · answered by The Wired 4 · 0⤊ 1⤋
the bulb absorbs some of the emitted light (energy) then its temperature rise.
2006-11-02 11:33:50 · answer #7 · answered by Ormoz 3 · 0⤊ 1⤋
well because it um gets that way when you um, Wait, what was the question?
2006-11-02 10:29:33 · answer #8 · answered by Anonymous · 0⤊ 2⤋