Question

at what temperature the heat energy start change into light energy​

Answer 1

Answer: All matter emits “light”. The night sky where it is total black, is still emitting at about 2.7 Kelvin. That's the cosmic background radiation.

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Answer 2

Answer:

2.7 Kelvin

Explanation:

All matter emits “light”. The night sky where it is total black, is still emitting at about 2.7 Kelvin. That's the cosmic background radiation.