It takes time 8 min for light to reach from the sun to the earth surface. If speed of light is taken to be 3 x 10⁸ms^-1, find the distance from the sun to the earth in km.

As we know, Distance = speed x time

Given,

Speed = 3 x 10⁸ms^-1

Time = 8 min = 8 x 60s = 480s

Substituting the values in the formula above we get,

Distance = 3 x 10⁸ x 480 = 1440 x 10⁸ m.

Converting the distance to km:

Distance in km = $\dfrac{1440 \times 10^8}{1000}$ km
= 1.44 x 10⁸ km

Therefore,
the distance from the sun to the earth is 1.44 x 10⁸ km.