Question

Is sodium vapour lamp is cold source of light?

Answer 1

Answer:

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 ..

Answer 2

Answer:

Explanation: OKEY SO FIRST OF ALL there is always a random motion of electrons and molecules so heat is there ,now if you are asking about temperature then in some conditions it can be true but  no it can be said that sodium is cold source of light ,one can say so as it feels cold and not burning a persons hand if he touches it ,but according to since it impossible to have a cold source of light as there always be some heat!