What is the colour of the star named Rigel?

Orange

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Blue

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Red

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Yellow

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Solution

The correct option is C
Red

The surface temperature determines the colour of the stars. The stars at high temperature appear blue in colour and those at the lowest temperature appear red in colour. The star named Rigel has blue colour.

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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?

Among red, yellow and blue, blue coloured light has the shortest wavelength.

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