Two waves of amplitude `5 mm and 7 mm` reach a point in opposite phase. What is the resultant amplitude ?

Two waves pf amplitude 3 nm and 5 nm reach a point in opposite phases. What is the resultant amplitude ?

Two waves of amplitudes 3mm and 2 mm reach a point in the same phase. What is the resultant amplitude ?

If two light waves each of amplitude a travelling a travelling through a medium arrive at a point in opposite phase then the resultant amplitude R at that points is

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

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 ?