Practicing Success
Practicing Success
CUET Preparation Today
A star is $8.1 \times 10^{13}$ km away from the earth suppose light travels at the sped of $3 \times 10^5$ km/s. How long will it take to lake light from the star to reach the earth? |
$7.5 \times 10^3$ hrs. $7.5 \times 10^4$ hrs. $2.7 \times 10^{10}$ sec. $2.7 \times 10^{11}$ sec. |
$7.5 \times 10^4$ hrs. |
The correct answer is Option (2) → $7.5 \times 10^4$ hrs. |
