If the rate of nuclear fusion in the Sun's core were to change, how long would it take for the Sun's luminosity to change?

Question

Quizplus · Accepted Answer

The energy produced in the Sun's core takes about 100,000 years to reach the surface due to the random walk process of photons through the dense solar interior. Thus, any change in the core's fusion rate would take this long to affect the Sun's luminosity.

If the Rate of Nuclear Fusion in the Sun's Core