Question

In the original Fizeau method, the light travelled 8.6 km and then returned. What could be the difficulty if this distance is taken as 8.6 m?

Answer 1

From the above question, it is understood that the light travels 8.6 km and returns as per the original Fizeau method.  

Explanation:

• If the distance travelled by the light reduces, then there will be no difficulty. In the original Fizeau method, the light travels a large distance of 8.6 km.
• Thus, the light’s intensity considerably decreases, and the final image turns out to be dim.
• If suppose, the distance is reduced, because of the increased light intensity, the final image becomes dark.