Question

lexy and jin study the diagram shown. which best explains who is correct? lexy is correct because angle r is between the incident wave, ( n = 0 ), and a diffracted wave. lexy is correct because angle r includes the diffracted wave at ( n = 1 ). jin is correct because angle s is measured from the barrier and includes ( n = 2 ), the wave that has the most diffraction. jin is correct because angle s is between the dimmest order bands, ( n = 1 ) and ( n = 2 ). lexy says that the diffraction angle is the one labeled r, and jin says that the diffraction angle is the one labeled s

Explanation:

In diffraction, the diffraction angle is measured between the incident wave (\(n = 0\)) and a diffracted wave. Angle \(R\) fits this definition as it is between \(n = 0\) (incident wave) and another diffracted wave. Angle \(S\) is not measured in the correct way (not between incident and diffracted as per the standard diffraction - angle - measurement concept). For angle \(R\), it doesn't matter which specific diffracted order (as long as it's between incident and a diffracted). The statement about \(n = 2\) having the most diffraction in the option for Jin is incorrect as diffraction intensity depends on multiple factors and \(n = 2\) is not necessarily the'most' in a general sense. Also, the description about angle \(S\) including \(n = 1\) and \(n = 2\) in the wrong way (not the standard diffraction - angle - measurement).

Answer:

Lexy is correct because angle R is between the incident wave, \(n = 0\), and a diffracted wave.