Question

Young new stars have colour, while older stars have colour.

• A. red
• B. white
• C. blue
• D. black

Answer 1

Answer: (A), (C)

The correct options are
A red
C blue

Young and new stars have high temperature and hence, are quite hot, whereas old stars are comparatively colder. Generally, the objects which have high temperature, emit more blue light while the objects which are less hot, emit more red light. Thus, younger stars look blue while older stars look red.