A travelling wave of amplitude `5 A` is partically reflected from a bounday with the amplitude `3A`. Due to superposition of two waves with different amplitude in opposite direction a standing wave pattern is formed. Datermine the ratio of amplitude at antinode to node.

Answer

4

Explanation

`A_(i) = 5 A`
`A_(r) = 3 A`
As it is the carer of partially standing wave
`:. A_(NODE) = A_(i) - A_(r)`
`= 2A` and `A_(ANTINODE) = A_(i) + A_(r) = 8A`