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ChemistryChemistry
4 March, 22:28

The Hertzsprung-Russell Diagram

Answer the questions using the above HR Diagram

1. What factor affects the color of a star?

2. What is luminosity?

3. What factor affects the luminosity of a star?

4. What is the approximate surface temperature of the sun?

5. What is the color of the stars with the highest surface temperature?

6. What type of star has a high temperature but a low luminosity?

7. Most of the stars on the HR Diagram are classified as which type of star?

8. How is it possible for white dwarfs to have a lower luminosity than the sun even though the sun is cooler than white dwarfs?

9. What is the color of the stars with the lowest surface temperature?

10. What type of star has a low temperature but a high luminosity? Download pdf

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Answers (1)
  1. 5 March, 01:44
    0
    1. surface temperature

    2. Luminosity is an absolute measure of radiated electromagnetic power, the radiant power emitted by a light-emitting object. In astronomy, luminosity is the total amount of electromagnetic energy emitted per unit of time by a star, galaxy, or other astronomical object.

    3. Luminosity depends on temperature and size

    4. 6000 Kelvin

    5. blue, white, yellow, orange, red

    6. white dwarfs

    7. main sequence

    8. Since the white dwarf is smaller, it can have a lower luminosity

    9. Red

    10. Red Giants
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