ESS
Grade-9
Easy
Question
Star A = Red star and Star B = Blue star. Which one is hotter?
- Star A is hotter.
- Star B is hotter.
- We also need to know the luminosities of the stars to find out their temperatures.
- There is no relation between color and temperature.
Hint:
The blue stars are hotter than the red stars.
The correct answer is: Star B is hotter.
- The types of stars are arranged based on their temperature.
- The blue stars are cooler than the red stars.
- The red stars are hotter than the blue stars comparatively and have more luminousence.
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| 1. Rigel |
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Color of the star |
| 1. Rigel |
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| 2. Sirius B |
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