Chapter 26, Problem 13Q

To determine

The speed of the light were only 25 m/s.

Answer to Problem 13Q

Solution:

The sunlight reaches the earth is $8.31\min$ c.

Explanation of Solution

Given:

The height travels at a speed of 25 m/s the time taken by sunlight to reach the earth

$\begin{array}{l}t=\frac{ distance between sun and earth}{25}\\ =\frac{14.96\times {10}^6\times {10}^3}{25}\\ =5.98\times {10}^9\sec \\ =1.7\times {10}^{6}hours\end{array}$

Normally sunlight reaches the earth in a time of

$\begin{array}{l}t=\frac{149.6\times {10}^{9}m}{3\times {10}^8}\\ =8.31\min \end{array}$