Question

A glowing of tubelight is _______

Answer 1

PHYSICAL CHANGE

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Answer 2

PHYSICAL CHANGE........Both the tube lights and the CFLs work by the same principle. These lamps consist of a fluorescent phosphor coated glass tube filled with a mixture of the inert gas argon and mercury vapour. This gas is excited by the energetic electrons emitted from the cathodes provided at the ends of the tube