In young double slit experiment the ratio of intentsities of bright and dark bands is 16 which means

Options

A. the ratio of their amplitudes is 5
B. intensites of individual source are 25 and 9 unit respectively
C. the ratio of their amplitudes is 4
D. intensities of individual sources are 4 and 3 units respectively

Answer

B

Explanation

`(I_("max"))/(I_("min")) =((a_(1)+a_(2))^(2))/((a_(1)-a_(2))^(2))=(16)/(1)`
`=:. (a_(1))/(a_(2))=(5)/(3)`
But `I propa^(2)`
`:. (I_(1))/( I_(2))=(a_(1)^(2))/(a_(2)^(2))=(25)/(9)`