Q. 1744.5( 2 Votes )

# A particular star is at a distance of about 8.1 × 10^{13} km from the Earth. Assuring that light travels at 3 × 10^{8} m per second, find how long does light takes from that star to reach the Earth.

Answer :

Speed = or

Time Taken =

=

= 2.7x10^{8} seconds.

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