Which statement best describes the reflection of a wave?(1 point)
Responses
A wave fails to reach the surface of a material.
A wave fails to reach the surface of a material.
A wave transfers its energy to a material.
A wave transfers its energy to a material.
A wave bounces off the surface of a material.
A wave bounces off the surface of a material.
A wave passes through a material.
The correct statement is: A wave bounces off the surface of a material.
How is an echo formed?(1 point)
Responses
Sound waves travel into a soft surface.
Sound waves travel into a soft surface.
Light waves pass through a shiny surface.
Light waves pass through a shiny surface.
Sound waves bounce off a flat surface.
Sound waves bounce off a flat surface.
Light waves go around a smooth surface.
The correct statement is: Sound waves bounce off a flat surface.
The surface of which material is least likely to reflect light?(1 point)
Responses
mirror
mirror
pillowcase
pillowcase
water
water
sheet of metal
The correct statement that best describes the reflection of a wave is: "A wave bounces off the surface of a material."
The statement that best describes the reflection of a wave is "A wave bounces off the surface of a material."
To understand why this is the correct answer, we need to understand the concept of wave reflection. When a wave encounters a boundary between two mediums (materials), part of the wave's energy is transmitted through the boundary, and part of it is reflected back into the original medium.
To determine the behavior of a wave at a boundary, we need to consider the properties of the two mediums involved. If the second medium is less dense or has a lower wave speed than the first medium, the wave will be reflected when it reaches the boundary.
In the case of reflection, the wave "bounces" off the surface of the material, meaning it changes direction and travels back into the original medium. This happens because the interface between the two materials acts like a mirror, causing the wave to reverse its direction. The energy of the wave is conserved, but its direction changes.
So, in summary, when a wave encounters a boundary between two materials and bounces back into the original medium, it is said to be reflected.