Hmm, well lets see, if it's chemical there's no going back right? You cant make it into what it was, so if a flashbulb goes off, it like, explodes, and you need a new one because you can't use a broken bulb...(duh)... so i guess it's a chemical change . (Sorry for not getting to the point quickly ^-^)
A 13-15 watt compact fluorescent bulb (CFL) or a 9-11 watt LED bulb is roughly equivalent to a 60 watt incandescent bulb in terms of light output.
Lighting is a physical change, not a chemical change. When a light switch is turned on, the flow of electricity through the bulb causes it to emit light, which is a physical reaction. No new substances are formed during this process.
A light switch simply completes a circuit, allowing electrical energy to flow through a light bulb which then produces light energy. In a flashlight, a battery provides electrical energy which is converted into light energy by the bulb or LED.
It will have the same effect as a flourescent light bulb. Its basically the same light. On a white flourescent light bulb, the inside has been frosted white to give off a white light. Without this coating, its the same as a black light. The uv rays are the same.
No, the glowing of a light bulb is a reversible change because it can be turned off by disconnecting the power source. The light bulb will stop glowing once the electrical current is interrupted.
flourescent light bulb
No.
Physical change
A flourescent light bulb lasts between 6000 to 18000 hours.
No, a light bulb is not a reversible change. When the filament inside the light bulb heats up and emits light, it undergoes a chemical change and cannot be easily reversed.
in a compact flourescent about 8mg.
A light bulb is not a change in and of itself but the process by which it gives off light is physical. While an electric current causes a given component of the bulb to glow (it may be the filament of an incandescent bulb or the vapor in a fluorescent one), but that substance does not change its chemical identity.
compact flourescent light bulbs (cfl) the swirly ones
Physical change
The flourescent light bulb was invented in 1827.
Possible oxidation of the metallic filament with traces of oxygen existing in the light bulb.
Flourescent light bulbs are approximately double the price of a standard bulb. There is an advantage to them though, they last longer and are more energy efficient.