Star colour and absolute magnitude
Answers are for parents and teachers.
1
For a star with T = 14,500 K, how many nm is λ_max = 2,900,000 : 14,500?
200
2
At d = 10 pc, m = 5. M = ?
5
3
d = 100 pc, m = 8. M = 8 – 5 = ?
3
4
At 10 times farther than 10 pc (100 pc), what is m – M?
5
5
Why can a red giant be very luminous though cool?
Its surface is huge and luminosity grows with surface area (L = 4πR²σT⁴).