Question

Light travels at a speed of 3 x 108 m/s1. How long does light take to reach the earth from the sun, which is 1.5 x 1011 m away? (Ans. 5 x 102 sec.)​

Answer 1

Answer:

By a basic formula,

time = Distance/Speed

t = $\frac{1.5 * 10^{11} }{3*10^{8} }$

t = $\frac{15 * 10^{10} }{3*10^{8} }$

 = 5 x $10^{2}$ = 500 sec

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