The correct formula for fringe visibility is.

V = \frac{I_{m a x} - I_{m i n}}{I_{m a x} + I_{m i n}}

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V = \frac{I_{m a x} + I_{m i n}}{I_{m a x} - I_{m i n}}

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V = \frac{I_{m a x}}{I_{m i n}}

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V = \frac{I_{m i n}}{I_{m a x}}

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Solution

The correct option is A $V = \frac{I_{m a x} - I_{m i n}}{I_{m a x} + I_{m i n}}$
Also called the Michelson fringe visibility, the fringe visibility is defined in terms of the observed intensity maxima and minima in an interference pattern by $V = \frac{I_{m a x} - I_{m i n}}{I_{m a x} + I_{m i n}}$

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Similar questions

4,

\frac{I_{m a x} - I_{m i n}}{I_{m a x} + I_{m i n}}

α

\frac{I_{m a x} - I_{m i n}}{I_{m a x} + I_{m i n}} =

β

(I_{m a x} - I_{m i n}) / (I_{m a x} + I_{m i n})

β

\frac{I_{m a x} - I_{m i n}}{I_{m a x} + I_{m i n}}

Two coherent sources of intensity ratio $β$ interfere. Then the value of $(\frac{I_{max} - I_{min}}{I_{max} + I_{min}})$ is:

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