Question

the mean distance of the sun from earth is 10 power 5 km the Time taken by light to reach the earth from sun is

Answer 1

Distance = Speed * Time

=> Time = Distance / Speed

Distance = 10⁵ km = 10⁸ m [ Since 1 km = 1000 m, 10⁵ km = 10⁸ m ]

Speed of light = 3 * 10⁸ m / s

Time = 10⁸ m / 3 * 10⁸ m / s

=> Time = 1 / 3 seconds = 0.34 seconds

Hence the time taken by light to reach earth is 0.34 seconds.

Since the distance given is not the accurate value, we are getting a different time period for light's travel.

Hope it helped !