Question

Choose the list below that properly arranges the order of spectra classes (from hottest to coldest)

Select one:

a. T,L,M,K,G,F,A,B,O

b. O,B,G,A,M,K,F,L,T

c. O,B,A,F,G,K,M,L,T

d. A,B,F,G,K,L,M,O,T

Answer 1

Answer:

c. O,B,A,F,G,K,M,L,T

Explanation:

The class and the temperature range are as follows -

Class     The temperature range -

O            ≥ 30,000 K

B           10,000–30,000 K

A            7,500–10,000 K

F            6,000–7,500 K

G           5,200–6,000 K

K           3,700–5,200 K

M            2,400–3,700 K

The the order of the stars which can be arranged as per the spectrum is given below  -

O , B , A , F , G , K , M , L , T