Question

Some stars appear red in colour and some blue in colour. Which one of the statements is true?

• A. Star with blue colour has more temperature than red colour star
• B. Temperature of blue colour star is less than red colour star
• C. There is no relation between colour of the star and temperature
• D. Blue colour star and red colour star has equal temperature

Answer 1

The correct option is A Star with blue colour has more temperature than red colour star

Class	Temperature(kelvins)	Conventional color	Apparent color
0	$\ge$33,000K	blue	blue
B	10,000-30,000 k	blue to blue white	blue white
A	7,500-10,000 k	white	white to blue white
F	6,000-7,500 k	yellowish white	White
G	5,200-6,000 k	yellow	yellowish white
K	3,700-5,200 K	orange	yellow orange
M	$\le$ 3,700 K	red	orange red

Hot stars are blue, and medium-hot stars are white, and cool stars are red.