Question

1. the luminosity and temperature of the model star can be described as (1) having a luminosity value less than that of our sun, but at a higher temperature. (2) having a luminosity value less than that of our sun, but at a lower temperature. (3) having a luminosity value greater than that of our sun, but at a lower temperature. (4) having a luminosity value greater than that of our sun, but at a temperature always hotter than our sun. 5

Explanation:

On the Hertzsprung - Russell (H - R) diagram, stars can have different combinations of luminosity and temperature. Some red giants have greater luminosity than the Sun but lower temperatures.

Answer:

(3) having a luminosity value greater than that of our Sun, but at a lower temperature.