InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Equation of a plane progressive wave is given by `y=0.6 sin 2pi(t-(x)/(2)).` On reflection from a denser medium, its amplitude becomes `2//3` of the amplitude of the incident wave. The equation of the reflected wave isA. `y= 0.6 sin 2pi(t+x/2).`B. `y= -0.6 sin 2pi(t+x/2).`C. `y= 0.4 sin 2pi(t+x/2).`D. `y= -0.4 sin 2pi(t-x/2).` |
|
Answer» Correct Answer - b On reflection from a denser medium, there is a phase reversal of `180^(@)` New amplitude `0.6` `therefore` Equation of reflected wave is ltbegt `y= 0.6 sin 2pi [ t +x/2 +180^(@)]=-0.6 sin 2pi (t+x//2)` |
|