Spectral class

Question 1

What is the acronym for spectral class?

Answer 1

Oh Be A Fine Girl, Kiss Me

Question 2

What colour is the spectral class O?

Answer 2

Blue (25,000K-50,000K)

Question 3

What colour is the spectral class B?

Answer 3

Blue (11,000K-25,000k)

Question 4

What colour is the spectral class A?

Answer 4

Blue-White (7500K-11,000K)

Question 5

What colour is the spectral class F?

Answer 5

white (6000k-7500k)

Question 6

What colour is the spectral class G?

Answer 6

yellow-white (5000k-6000k)

Question 7

What colour is the spectral class K?

Answer 7

orange (3500k-5000k)

Question 8

What colour is the spectral class M?

Answer 8

red (less than 3500

Question 9

What spectral class has the absorption lines of He+,He and H?

Answer 9

O (blue)

Question 10

What spectral class has the absorption lines of He and H?

Answer 10

B (blue)

Question 11

What spectral class has the absorption lines of H (strongest) and Ionised metals?

Answer 11

A (blue-white)

Question 12

What spectral class has the absorption lines of ionised metals?

Answer 12

F (white)

Question 13

What spectral class has the absorption lines of ionised metals and neutral metals?

Answer 13

G (yellow/white)

Question 14

What spectral class has the absorption lines of neutral metals?

Answer 14

K (orange)

Question 15

What spectral class has the absorption lines of neutral atoms and Tio (titanium oxide)?

Answer 15

M (red)