Which region of the H-R diagram is occupied by Red Giants or Supergiants?

Answer

The upper-right section

Red Giants and Supergiants are characterized by being very luminous (high on the diagram) yet having relatively cool surface temperatures (to the right).

Which region of the H-R diagram is occupied by Red Giants or Supergiants?

#Videos

HR Diagram Explained - Star Color, Temperature and Luminosity

temperaturesequencestarLuminositydiagram