Question

question 10
the surface temperature of star is plotted against the stars luminosity on the
doppler effect.
parallax graph.
cosmic background radiation map.
h - r diagram.

Explanation:

The Hertzsprung - Russell (H - R) diagram plots the surface temperature of stars on the x - axis and their luminosity on the y - axis. The Doppler effect is related to the change in frequency of waves due to relative motion. Parallax is used to measure distances to nearby stars. Cosmic background radiation is leftover radiation from the early universe.

Answer:

D. H-R diagram