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Two waves, of equal wave length and frequency having initial phase difference zero, travelling in same direction superimpose with each other at a point in space where path difference is `lambda/6 (lambda=` wavelength of each wave). If `4I_0` and `I_0` are intensity of two wave then intensity of resultant wave at the point of superposition is
A. |
`9I_0` |
B. |
`5I_0` |
C. |
`3I_0` |
D. |
`7I_0` |
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