Which two immediate physical manifestations translate a star's mass into high intrinsic brightness?

Answer

Size (Radius) and Surface Temperature

The intense core pressure heats the outer layers (increasing surface temperature) and often leads to a larger radius, both of which contribute significantly to the total light escaping into space.

Which two immediate physical manifestations translate a star's mass into high intrinsic brightness?

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Why Would The Size Of A Star Affect Its Luminosity? - Physics Frontier

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