PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoWhy is the distance between stars expressed in light years? What do you understand by the statement that a star is eight light years away from the Earth?
The distance of the stars from the Earth or the distance between any two stars are . So, it is inconvenient to express the distances in terms of . Hence, the large distances are expressed in .
It is defined as the travelled by . The value of one light-year is given as \times {10}^{12} kilometres.
A star is 8\ light\ -years away from the Earth means that the star is at a equal to the distance covered by light in years. Hence, the value is \times {10}^{13} kilometres.
Register for free to see more content