☰ Contents · Astronomy

Ulugh Beg’s observatory and radiation laws

Lessons 32–33 · 2 lessons · M. Mamadazimov. Astronomy Grade 11, 1st edition. DAVR NASHRIYOTI, Tashkent, 2018
Answers are for parents and teachers.
1
T = 5800 K: λ_max = 2,900,000 : 5800 is how many nm?
2
If Δλ / λ = 0.0002, what is v in km/s? (300,000 : 5000)
3
If the temperature triples, by what factor does the radiated power grow? (3⁴)
4
Ulugh Beg was born in 1394 and died in 1449. How many years did he live?
5
Why do we call Ulugh Beg’s instrument a “sextant”, not a “telescope”?