nichrome is note used as filament incandensent why
glows brightly
it emit white light
Answers
Answer:
nichrome is note used as filament incandensent why
glows brightly
it emit white light
Explanation:
Nichrome wire, an alloy of nickel and chromium, and often iron (or other elements) is good for making heaters but not lamps. At rated voltages, nichrome will glow orange-red, not the bright white that is needed for illumination. If you increase the voltage to get a brighter color, the nichrome will burn open (melt.) The challenge in designing lamp filaments is finding a material that gives a bright glow but does not burn open.
Take a look at the glow inside your toaster. It’s not very bright. It might be good for mood lighting.
Edison worked for many years to find a material that would glow brightly and not burn open.
There are a lot of people who think that Thomas Edison invented the electric light bulb. That’s not accurate. Edison invented the LONG LASTING electric light that was commercially feasible. Edison and his staff experimented with thousands of materials, including oddities such as carbonized human hair and carbonized sewing thread before getting good results with bamboo and later with a tungsten alloy recipe. One of the other challenges was to create a means to hold the material so that the filament would not be easily broken. When metals get hot, they get brittle.
It’s interesting to note that nichrome is still around as a means of resistance heating. Incandescent lamps are being replaced by new lighting technologies such as LED-s, but toasters are still being made with nichrome filaments!