1.

In the Young's double -slit experiment, the interference pattern is found to have intensity ratio between bright and dark fringes as 9.This implies that

Answer»

the INTENSITIES at the screen due to the two slits are 5 units and 4 units respectively
the intensities at the screen due to the two slits are 1 unit and 4 units respectively
the amplitude RATIO is 3
the amplitude ratio is 2

Solution :Here, `((R + 1)/(r -1))^(2) = 9`
`RIGHTARROW r = 2`
i.e. ` (A_(1))/(A_(2)) = (2)/(1)`


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