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Two coherent sources of Iight having int...

Two coherent sources of Iight having intensities, I and 4I interfere a fainge pattern on a screen. Find the resuItant intensities at the points where the phere the phase- differ- ence between the two waves are `(pi)/(2)`and `pi`.

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5 I and I
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When waves from two coherent source of amplitudes a and b superimpose , the amplitude R of the resultant wave is given by R = sqrt(a^(2)+b^(2)+2ab cos phi). where phi is the constant phase angle between the two waves. The resultant intensity I is directly proportional to the square of the amplitude of the resultant wave i.e I prop R^(2) i.e, I prop (a^(2) +b^(2) +2ab cos phi ) For constructive interference , phi = 2n pi " ""and"" " I _("max") = (a+b)^(2) For destructive interference , phi = (2n-1) pi "and" I_("min") = (a-b)^(2) If I_(1) I_(2) are intensities from two slits of width w_(1) "and" w_(2) then I_(1)/I_(2)=w_(1)/w_(2)=a^(2)/b^(2) Light waves from two coherent sources of intensity ratio 81 : 1 produce interference. With the help of the passage choose the most appropriate alternative for each of the following questions If two slits in Young's experiment have width ratio 1:4 the ratio of maximum and minimum intensity in the interference pattern would be

When waves from two coherent source of amplitudes a and b superimpose , the amplitude R of the resultant wave is given by R = sqrt(a^(2)+b^(2)+2ab cos phi). where phi is the constant phase angle between the two waves. The resultant intensity I is directly proportional to the square of the amplitude of the resultant wave i.e I prop R^(2) i.e, I prop (a^(2) +b^(2) +2ab cos phi ) For constructive interference , phi = 2n pi " ""and"" " I _("max") = (a+b)^(2) For destructive interference , phi = (2n-1) pi "and" I_("min") = (a-b)^(2) If I_(1) I_(2) are intensities from two slits of width w_(1) "and" w_(2) then I_(1)/I_(2)=w_(1)/w_(2)=a^(2)/b^(2) Light waves from two coherent sources of intensity ratio 81 : 1 produce interference. With the help of the passage choose the most appropriate alternative for each of the following questions The ratio of maxima and minima in the interference pattern is

When waves from two coherent source of amplitudes a and b superimpose , the amplitude R of the resultant wave is given by R = sqrt(a^(2)+b^(2)+2ab cos phi). where phi is the constant phase angle between the two waves. The resultant intensity I is directly proportional to the square of the amplitude of the resultant wave i.e I prop R^(2) i.e, I prop (a^(2) +b^(2) +2ab cos phi ) For constructive interference , phi = 2n pi " ""and"" " I _("max") = (a+b)^(2) For destructive interference , phi = (2n-1) pi "and" I_("min") = (a-b)^(2) If I_(1) I_(2) are intensities from two slits of width w_(1) "and" w_(2) then I_(1)/I_(2)=w_(1)/w_(2)=a^(2)/b^(2) Light waves from two coherent sources of intensity ratio 81 : 1 produce interference. With the help of the passage choose the most appropriate alternative for each of the following questions The ratio of slit widths of the two sources is

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