Which of the following quantities is equal to the energy per second generated by the Sun's nuclear reactions?

Question

Quizplus · Accepted Answer

The luminosity of the Sun's photosphere measures the total amount of energy radiated by the Sun per unit time (usually given in watts). Since this energy is generated by nuclear reactions in the Sun's core, the luminosity is equal to the energy per second generated by these reactions. The other choices are not directly related to the Sun's nuclear reactions. The temperature at the Sun's photosphere (A) is a result of the energy released by the nuclear reactions, but it is not a measure of the energy per second generated by these reactions. The force of gravity holding the Sun together (C) is a result of the Sun's mass and the distribution of mass within it, but it is not directly related to the energy per second generated by the nuclear reactions. The temperature of the Sun's core (D) is related to the energy per second generated by the nuclear reactions, but it is not a measure of this energy itself.

Which of the Following Quantities Is Equal to the Energy