Question

The phase difference between two waves reaching a point is pi//2. What is the resultant amplitude, if the individual amplitudes are 3mm and 4mm ?

Answer 1

Answer:

1 mm since the phase difference is

$\frac{\pi}{2}$

Explanation:

Since the waves are oppositely lying it will make distructive interference

Answer 2

Answer:

a2+b2+2abcosπ/2−−−−−−−−−−−−−−−−−√=32+42−−−−−−√

=5mm

Explanation: