Light Reflection & Refraction

What is reflection of light?

• Reflection of light is the process where light bounces off a surface, changing direction but not its wavelength.

• Reflection of light is the emission of light from a source.

• Reflection of light is the bending of light waves around an object.

• Reflection of light is the absorption of light by a surface.

State the laws of reflection.

• The incident ray and the reflected ray are parallel to each other.

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

• The laws of reflection only apply to concave mirrors.

• The laws of reflection are: 1. The angle of incidence is equal to the angle of reflection. 2. The incident ray, the reflected ray, and the normal to the surface all lie in the same plane.

Define angle of incidence and angle of reflection.

• Angle of incidence is the angle between the incident ray and the reflected ray.

• Angle of reflection is the angle between the incident ray and the normal to the surface.

• Angle of incidence is the angle between the reflected ray and the normal to the surface.

• Angle of incidence is the angle between the incident ray and the normal to the surface at the point of incidence. Angle of reflection is the angle between the reflected ray and the normal to the surface at the point of reflection.

Explain the difference between regular and diffuse reflection.

• Regular reflection occurs only in vacuum, while diffuse reflection occurs in any medium.

• Regular reflection involves the bending of light rays, while diffuse reflection involves the absorption of light rays.

• Regular reflection involves smooth surfaces reflecting light rays at the same angle, while diffuse reflection involves rough surfaces reflecting light rays in various directions.

• Regular reflection is a form of refraction, while diffuse reflection is a form of diffraction.

What is refraction of light?

• Refraction of light is the absorption of light by a medium

• Refraction of light is the emission of light from a source

• Refraction of light is the bending of light as it passes from one medium to another due to a change in its speed.

• Refraction of light is the reflection of light off a surface

Describe how light bends when it passes from one medium to another.

• Light bends when it passes from one medium to another due to the change in speed caused by the change in optical density.

• Light bends when it passes from one medium to another due to magnetic interference

• Light bends when it passes from one medium to another due to temperature changes

• Light bends when it passes from one medium to another due to gravitational pull

What is the first law of refraction?

• Newton's Law of Cooling

• Fermat's Principle

• Snell's Law

• Hooke's Law

Define refractive index.

• Refractive index is the resistance of a material to heat

• Refractive index is the measure of brightness in a material

• Refractive index is the weight of an object in a medium

• Refractive index is the ratio of the speed of light in a vacuum to the speed of light in the medium.

How does the speed of light change when it enters a medium with a higher refractive index?

• The speed of light remains constant

• The speed of light becomes infinite

• The speed of light increases

• The speed of light decreases

Explain total internal reflection.

• Total internal reflection happens when the angle of incidence is less than the critical angle.

• Total internal reflection is the same as regular reflection.

• Total internal reflection occurs only in transparent materials.

• Total internal reflection is the reflection of all the incident light off the boundary between two media with different refractive indices, occurring when the angle of incidence is greater than the critical angle.