Optics Question 774
Question: The mean distance of sun from the earth is $ 1.5\times 10^{8}Km $ (nearly). The time taken by the light to reach earth from the sun is
[Pb. PET 2003]
Options:
A) 0.12 min
B) 8.33 min
C) 12.5 min
D) 6.25 min
Show Answer
Answer:
Correct Answer: B
Solution:
$ t=\frac{s}{v} $
$ =\frac{1.5\times 10^{8}\times 10^{3}}{3\times 10^{8}}=500\sec $ = 8.33 min.
