Question

Instead of mercury source if we use sodium vapour lamp then what changes will occur

Answer 1

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A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited ... Low- pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts.

A mercury-vapor lamp is a gas discharge lamp that uses an electric arc through ... Mercury vapor lamps are more energy efficient than incandescent

this is the reason that Mercury produce more energy.

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Answer 2

Works by electric discharge Fhigh/low pressu.ilaments of the lamp sputter fast moving electrons, which hit the sodium atoms (vapour) causing the valence electrons of the sodium atoms to excite te)Although sodium vapour lamps produce much higher light output (about 90 lumens/watt) they cannot be used in lighting applications where colour-render