HW 6.3: Reflection

What are the three possible outcomes when a wave hits a boundary between two materials?

• A) Absorption, reflection, transmission

• B) Refraction, diffraction, absorption

• C) Reflection, refraction, diffraction

• D) Absorption, dispersion, reflection

When a wave is absorbed by a material, what happens to the wave’s energy?

• It disappears

• It is transferred to the material’s energy stores

• It is reflected back

• It causes refraction

What does it mean when a wave is transmitted through a material?

• The wave is completely absorbed

• The wave changes its amplitude

• The wave enters the material and passes through it

• The wave is destroyed

Which factor determines whether a wave is absorbed, transmitted, or reflected?

• The speed of the wave

• The frequency of the wave

• The properties of the materials and the wave’s wavelength

• The temperature of the materials

What is the angle of incidence in reflection?

• The angle between the incoming ray and the surface

• The angle between the incoming ray and the normal

• The angle between the reflected ray and the normal

• The angle between the transmitted ray and the surface

According to the law of reflection, what is true about the angles of incidence and reflection?

• The angle of incidence is always greater

• The angle of reflection is always smaller

• They are always equal

• They are unrelated

What is the normal in a ray diagram?

• The incoming ray of light

• The reflected ray of light

• A line perpendicular to the surface at the point of incidence

• A line parallel to the surface at the point of incidence

What is the point where the incoming ray touches the boundary called?

• Normal point

• Point of reflection

• Point of incidence

• Reflection boundary

What type of reflection occurs on a smooth, flat surface like a mirror?

• Diffuse reflection

• Scattered reflection

• Specular reflection

• Refracted reflection

Why can’t you see your reflection on rough surfaces like paper?

• Light is absorbed by the paper

• Light is transmitted through the paper

• Light is scattered in many directions causing diffuse reflection

• The angle of reflection is greater than the angle of incidence