Question
Describe the working of an Electrodeless Discharge Lamp (EDL).
Answer :
Word Count : 252
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Composition: glass envelope (20 x 40 mm) - Pyrex, quartz filling material (1-10 mg) - Hg, Cd, P, I2, S, Se
noble gas (0.1-30 Torr) - Ar
Principle:
microwave UV/VIS radiation
Hg-EDL operation in the block:
Free electrons (e-) in EDL are accelerated by microwave field.
Accelerated electrons collide with the argon atoms (Ar) and ionize (Ar+) or excite (Ar*) them.
Excited argon atoms (Ar*) collide with mercury atoms to form exciting
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