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.
a) To draw the incident wave ray indicating the direction of motion of the incident wavefront, we need to imagine a straight line that starts from the top end of the wavefront and extends towards the barrier. This line represents the path along which the wavefront is moving.
b) To draw the normal, we need to draw a dashed line that is perpendicular to the barrier. The normal represents the direction perpendicular to the barrier's surface.
c) The reflected wave ray can be drawn by extending the incident wave ray in the opposite direction after it hits the barrier. The angle of reflection (qr) is equal to the angle of incidence (qi) but measured from the normal line.
d) To draw the location of the reflected wave crest, we need to understand that the reflected wavefront will be parallel to the incident wavefront but moving in the opposite direction. Therefore, we can draw the reflected wave crest anywhere on the reflected wave ray. It's important to note that the reflected wavefront is connected to the reflected wave ray at the point where they intersect.
Here is a step-by-step breakdown of the drawing:
1. Start by drawing the wavefront closest to the barrier.
2. Draw the incident wave ray starting from the top end of the wavefront and extending towards the barrier.
3. Draw a dashed line perpendicular to the barrier as the normal.
4. Label the angle of incidence (qi) at the point where the incident wave ray hits the barrier.
5. Extend the incident wave ray in the opposite direction after it hits the barrier to represent the reflected wave ray.
6. Label the angle of reflection (qr) as equal to the angle of incidence (qi) but measured from the normal line.
7. Draw one possible location of the reflected wave crest anywhere on the reflected wave ray, making sure it is parallel to the incident wavefront and in the opposite direction.
8. Pay attention to the orientation of the reflected wavefront relative to the reflected wave ray and indicate the connecting point between the wave crest and the ray.
Remember, this is just one possible interpretation of the diagram based on the given information.