White light may be considered to be mixture of waves of `lambda` ranging between `3900 Å` and `7800 Å`. An oil film of thickness `10,000 Å` is examined normally by the reflected light. If `mu=1.4`, then the film appears bright for
A
` 4000 , 466 Å , 5600 Å, 7000 Å`
B
`4308 Å, 5091 Å, 6222 Å`
C
`4000 Å, 5091 Å, 5600 Å`
D
` 4667 Å, 6222 Å, 7000 Å`
Text Solution
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The correct Answer is:
B
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