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Question
In a telescopic image of night sky, some stars are blue in colour while others appear to be red in colour. What determines the colour of the star?
In a telescopic image of night sky, some stars are blue in colour while others appear to be red in colour. What determines the colour of the star?
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Solution
The correct options are
A Surface temperature
B Age of the star
Surface temperature determines the colour of the stars. Stars at a higher temperature appear in blue colour and those at lowest temperature appear in red colour. The red ones are older and blue ones are younger. Thus by observing the colour of the star, we can determine its age as well.
A
Surface temperature
B
Age of the star
Surface temperature determines the colour of the stars. Stars at a higher temperature appear in blue colour and those at lowest temperature appear in red colour. The red ones are older and blue ones are younger. Thus by observing the colour of the star, we can determine its age as well.
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