Explanation:
In case of colored film we apply the theory of interference.
Condition that colored fringe is formed ( constructive interference)
2μt = λ/ 2 ( minimum order)
t = λ/ 4μ
= 540 / 4 x 1.38
= 97.83 nm
The Sun measures 1.4 million km across, while the Moon is a mere 3,474 km across. In other words, the Sun is roughly 400 times larger than the Moon. But the Sun also happens to be 400 times further away than the Moon, and this has created an amazing coincidence.
Explanation: