# physics

Be sure to show all your work and explain the method of arriving at your answer. The diagram below shows three wavefronts moving to the right, approaching a solid barrier.

a) We will focus on the wavefront closest to the barrier. Draw the incident wave ray indicating the direction of motion of the incident wavefront. Draw this ray from the top end of the wavefront and show the ray in contact with the barrier.

b) Draw a normal using a dashed line, and label the angle of incidence (qi) for this wave ray.

c) Draw the reflected wave ray and label the angle of reflection (qr).

d) Draw one possible location of the reflected wave crest anywhere on the reflected wave ray. In your answer, pay particular attention to the orientation of the reflected wavefront relative to the reflected wave ray. Also, be careful to indicate what part of the reflected wavefront is connected to the reflected wave ray.

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