JEE Main 2022 Physics question
Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary wave whose equation is given by y = (10 cos ) cm. The amplitude of the particle at x = 4/3 cm will be cm.
Answer: 5
Solution
The amplitude at position x is A = |10 cos . At x = 4/3: A = |10 = |−5| = 5 cm.