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What are the disadvantages of discharge lamp?
Disadvantages of sodium vapour discharge lamp
What is the work of capacitor in sodium vapour lamp?
A sodium vapour lamp does not include a capacitor in its construction. Any capacitor associated with this type of fixture will be found where the ballast is located and not in the lamp itself.
What element is used in the lighting of street lamps?
Sodium-vapour lamp, electric discharge lamp using ionized sodium,
What is hpsv lamp?
High Pressure Sodium Vapour Lamps
What are the applications of sodium vapour lamp?
Low-pressure sodium lamps : outdoor lighting
What is the source of illumination employing vapour of the element Na?
Sodium lamp
Why argon and neon gas used in sodium vapour lamp?
Neon and argon are used as a gas starter in sodium lamps.
Principle of working of a sodium vapour lamp?
In a low pressure sodium vapour lamp, argon or neon gas is first heated up to emit a slight red or purple glow. The heat from this warms sodium metal in the light to the point of vaporizing, which is when the familiar yellow glow begins.
What happens if you use a mercury source instead of sodium vapour lamp in diffraction grating experiment?
sodium vapour lamps produce much higher light output (about 90 lumens/watt) they cannot be used in lighting applications where colour-rendering property is very crucial. This is because most of the light emitted from a sodium vapour lamp is concentrated in the yellow part of the visible spectrum (around 580-590 nm) On the other hand, a mercury vapour lamp is quite suitable for lighting applications. This is because, the mercury vapour lamp can feed almost the entire visible region (380-780 nm) of the human visual system.
Why a sodium vapour lamp gives pink colour followed by yellow?
This could be due to the fact that a sodium vapour lamp contains neon gas and when a current is passed through the two electrodes in the lamp the neon gas becomes ionised and shines red until vapourisation occurs and the sodium cause the typical characterised yellow.
How does ignitor in sodium vapour lamp work?
Similiar to a flourescent light. The ignitor provides a high voltage potential to excite the sodium gas within the bulb.
If you replace mercury light with sodium vapour lamp in spectrometer experiment what colors do you observe in the spectrum?
Green, Yellow and Orange.
