Question

The time taken by the solar radiations to reach earth is approximately is

• A. 8.3 hr
• B. 1.3 min
• C. 8.3 min
• D. 8.3 sec

Answer 1

Answer: (C)

8.3 min

The radiation travels by speed of light, the time taken can be simply calculated by dividing distance between sun and earth by speed of light. The distance between sun and earth is 1.5X10^11 m and speed of light is 299792458 m/s, which gives 500 s. Thus the answer is 8.3 minutes.