Question

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

Answer 1

a. Mass

Step-by-step 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 .