Question

What do diffraction and refraction have in common?

a. They both involve interference.

b. They both involve wave interactions.

c.They both involve reflection.

d.They both involve construction.

Answer 1

hello dear!!

b. They both involve wave interactions.

Answer 2

Answer:

Diffraction is the changing of direction of a wave as a result of having an obstacle placed in its way. Refraction is the bending of a wave as it passes from one medium to another. What do they have in common? They both involve the change in direction of a wave of something, whether it's light, water, or similar.

Explanation:

Diffraction is the changing of direction of a wave as a result of having an obstacle placed in its way. Refraction is the bending of a wave as it passes from one medium to another. What do they have in common? They both involve the change in direction of a wave of something, whether it's light, water, or similar.

If a linear object attached to an oscillator bobs back and forth within the water, it becomes a source of straight waves. These straight waves have alternating crests and troughs. As viewed on the sheet of paper below the tank, the crests are the dark lines stretching across the paper and the troughs are the bright lines. These waves will travel through the water until they encounter an obstacle - such as the wall of the tank or an object placed within the water. The diagram at the right depicts a series of straight waves approaching a long barrier extending at an angle across the tank of water. The direction that these wavefronts (straight-line crests) are traveling through the water is represented by the blue arrow. The blue arrow is called a ray and is drawn perpendicular to the wavefronts. Upon reaching the barrier placed within the water, these waves bounce off the water and head in a different direction. The diagram below shows the reflected wavefronts and the reflected ray. Regardless of the angle at which the wavefronts approach the barrier, one general law of reflection holds true: the waves will always reflect in such a way that the angle at which they approach the barrier equals the angle at which they reflect off the barrier.

The discussion above pertains to the reflection of waves off of straight surfaces. But what if the surface is curved, perhaps in the shape of a parabola? What generalizations can be made for the reflection of water waves off parabolic surfaces? Suppose that a rubber tube having the shape of a parabola is placed within the water. The diagram at the right depicts such a parabolic barrier in the ripple tank. Several wavefronts are approaching the barrier; the ray is drawn for these wavefronts. Upon reflection off the parabolic barrier, the water waves will change direction and head towards a point. This is depicted in the diagram below. It is as though all the energy being carried by the water waves is converged at a single point - the point is known as the focal point. After passing through the focal point, the waves spread out through the water.

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