InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Two periodic waves of intensities `I_(1)` and `I_(2)` pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is:A. `(l_(1)+l_(2))`B. `2(l_(1)+l_(2))`C. `(sqrt(l_(1))+sqrt(l_(2)))`D. `(sqrt(l_(1))-sqrt(l_(2)))` |
|
Answer» Correct Answer - B We know that, `l_(max)=(a_(1)+a_(2))^(2)` . . .(i) `l_(min)=(a_(1)-a_(2))^(2)` . . .(ii) On adding Eqs. (i) and (ii) we, get `l_(max)+l_(min)=(a_(1)+a_(2))^(2)+(a_(1)-a_(2))^(2)` `l_(max)+l_(min)=a_(a)^(2)+a_(2)^(2)+2a_(a)a_(2)+a_(a)^(2)+a_(2)^(2)-2a_(1)a_(2)` `l_(max)+l_(min)=2(a_(1)^(2)+a_(2)^(2))` But `lpropa^(2)` Therefore, `l_(max)+l_(min)=2(l_(1)+l_(2))` |
|