What one physical property determines a star's temperature, radius, and luminosity while it is on the Main Sequence?

Select one:

a. Mass

b. Magnetism

c. Chemical Composition

d. Location in the Galaxy

a. Mass

Explanation:

The relation between the physical properties, luminosity and mass, is given by the formula -

L = M ^ 3.5

In which,

L represents luminosity

and

M represents mass.

Hence, from the above formula,

mass and luminosity are directly proportional to each other, i. e.,

by decreasing the mass, the luminosity decreases

and by increasing the mass, the luminosity increases

higher luminosity means, higher temperature, and, in case the star has higher mass, its radius will also increase.