Illumination - Light Sources (Types of Lamps/Bulb)
Types of Electric lamp/bulb/luminaries Incandescent Lamp:- An incandescent light bulb, lamp or incandescent light globe is an electric light with a wire filament heated until it glows. The filament is enclosed in a bulb to protect the filament from oxidation. Current is supplied to the filament by terminals or wires embedded in the glass. Inventors are Joseph Swan, Thomas Edison Incandescent Lamp fig: High Pressure Mercury Vapour Lamp:- Explain with neat sketch construction and working of High Pressure Mercury Vapour Lamp Answer: Figure Mercury Vapour discharge lamp : What is Mercury Vapor Lamp ? Definition: A lamp that consists of vaporized mercury to generate light by using an electric arc is known as a mercury vapor lamp. Basically, this lamp discharges gas when heated or cooled. The mercury which is present inside the tube is in liquid form (at room temperature) which is ionized before generating light. Its wavelength at low pressure ranges ...