Question

ways in which luminosity of a flame can be increased

Answer 1

Hi friend here is your answer.

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If we place a convex lens then all the scattering lights will go on only one place and intensity will increase.

We can use NaCl to increase intensity.

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Answer 2

Ways in which luminosity of a flame can be increased are :

luminous flame is a burning flame which is brightly visible. Much of its output is in the form of visible light, as well as heat or light in the non-visible wavelengths.An early study of flame luminosity was conducted by Michael Faraday and became part of his series of Royal Institution Christmas Lectures, The Chemical History of a Candle.[1]