The displacement of a wave on a string is given by y = 0.04 (6x - 150t) ,

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

The displacement of a wave on a string is given by y=0.04cos⁡(6x−150t) ,y = 0.04\cos(6x - 150t)\,, where xx is in metres and tt in seconds. Which of the following represents a wave with the same amplitude, wavelength and frequency but travelling in the opposite direction? (a) y=0.04cos⁡(−6x+150t)y = 0.04\cos(-6x + 150t) (b) y=0.04cos⁡(6x+150t)y = 0.04\cos(6x + 150t) (c) −0.04cos⁡(6x−150t)-0.04\cos(6x - 150t) (d) y=0.04cos⁡(6x−75t)y = 0.04\cos(6x - 75t)

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