Question

1ộm You are standing mid-way between two speakers that are separated by a distance of 10m. The speakers are emitting a monotone sound with a wavelength of 3.Om. How far would you need to walk to the right to experience the first point of minimum intensity (destructive interference)? OA) 0.75 m OB) 1.5 m OC) 2.5 m OD) 30 m E) 3.6 m

Answer 1

Given,

The wavelength, $\lambda$ = 3 m

The distance separated, d = 10 m

For the first minima,

The path difference = one half of the wavelength

(5 + x) - (5 - x) = $\lambda$ / 2

2 x = 3/2

x = 3/4

= 0.75 m

Answer: A) 0.75 m