Chapter 32, Problem 3TE

What energy processes make the Sun shine? In what sense can it be said that gravity is the prime source of solar energy?

To determine

The reason behind the Sun shine and whether the gravity is the prime source of solar energy.

Answer to Problem 3TE

The nuclear fusion is the reason behind the Sun shines that occurs due the gravitational pressure.

Explanation of Solution

Gravity is called a prime source of solar energy because the fusion of hydrogen atom occurs due to the gravitational effect, which makes the atoms closer to each other and fuses.

Hydrogen fusion is the reason behind the shine of the Sun. The Sun shines by nuclear fusion of hydrogen into helium due to the Sun’s strong gravity and enormous size. Nuclear fusion generates intense pressure and high temperature at the core of the Sun.

Thus, gravity is the ultimate source which causes pressure to fuse atoms, makes the stars shine and even high temperature in the core of Sun.

Conclusion:

Therefore, the nuclear fusion is the reason behind the Sun shines that occurs due the gravitational pressure.