bromine is the name of the 4th halogen.
bromine is the name of the 4th halogen.
what is the name of the 4th halogen?
bromine
a halogen lamp, also known as a tungsten halogen, quartz-halogen or quartz iodine lamp, is an incandescent lamp consisting of a tungsten filament sealed into a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen such as iodine or bromine. the combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposits evaporated tungsten to the filament, increasing its life and maintaining the clarity of the envelope. for this to happen, a halogen lamp must be operated at a higher envelope temperature (250° c; 482° f) than a standard vacuum incandescent lamp of similar power and operating life; this also produces light with higher luminous efficacy and color temperature. the small size of halogen lamps permits their use in compact optical systems for projectors and illumination. the small glass envelope may be enclosed in a much larger outer glass bulb for a bigger package; the outer jacket will be at a much lower and safer temperature, and it also protects the hot bulb from harmful contamination and makes the bulb mechanically more similar to a conventional lamp that it might replace.
halogen lamp
kissa kursi ka









































kissa kursi ka () is a 1977 hindi political satire film directed by amrit nahata, who was a member of indian parliament and produced by badri prasad joshi. the film was a satire on the politics of indira gandhi and her son sanjay gandhi and was banned by the indian government during the emergency period and all prints were confiscated. music of the film was composed by jaidev verma.









































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kissa kursi ka