Two coherent light sources having intensity in the ratio 2x produce an interference pattern. The ratio ${{{I_{\max }} - {I_{\min }}} \over {{I_{\max }} + {I_{\min }}}}$ will be :
${{2\sqrt {2x} } \over {2x + 1}}$
${{2\sqrt {2x} } \over {x + 1}}$
${{\sqrt {2x} } \over {x + 1}}$
${{\sqrt {2x} } \over {2x + 1}}$
Solution
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