Stella spectra Flashcards
1
Q
Intrinsic colour of O
A
Blue
2
Q
Intrinsic colour of B
A
Blue
3
Q
Intrinsic colour of A
A
Blue-White
4
Q
Intrinsic colour of F
A
White
5
Q
Intrinsic colour of G
A
Yellow-White
6
Q
Intrinsic colour of K
A
Orange
7
Q
Intrinsic colour of M
A
Red
8
Q
what is the definition of an absorption spectrum
A
Dark lines against a continuous spectrum
9
Q
what do absorption spectra arise from
A
the interaction of photons and atomic electrons in elements in the stars upper layers
10
Q
what are the Balmer absorption lines
A
absorption lines seen from n=2 to n=3,n=4 ect.
11
Q
why do the Balmer absorption lines occur
A
The outer layers in some stars are at a temp that keeps atomic hydrogen in the n=2excited state
