Doppler effect shifts the wavelengths of the stars moving away from us-

• towards the redder domain

• Towards the bluer domain

Extremely hot stars do not produce absorption spectra

• True

• False

Stars with low luminosity generally have a lower effective temperature

• True

• False

Which stars are called a zero-age star?

• Red Giants

• Blue Giants

• White dwarfs

• Main sequence stars

The brightness of two stars at the same temperature is proportional to? select all that apply

• Chemical composition

• Radius

• Radius squared

• Distance of the star

As we move left to right along the HR diagram effective temperature decrease

• True

• False

How many spectral subclasses are there?

• 58

• 83

• 70

• 90

Subsolar ZAMS stars die younger

• Yes

• No

Pick all that apply - Older stars in a galaxy

• are called pop II stars

• are called pop I stars

• contain much more heavier elements than younger stars

• contain much less heavier elements than younger stars

CN cycle following stars are generally found in the HR diagram

• in the upper part of the main sequence

• in the lower part of the main sequence

• near the giants

• near the white dwarfs.