Exploring Light: Reflection and Refraction

What is the law of reflection?

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

• The angle of reflection is always zero degrees.

• The angle of incidence and reflection are unrelated to each other.

• The angle of incidence equals the angle of reflection.

Define the angle of incidence.

• The angle of incidence is the angle between the incident ray and the direction of motion.

• The angle of incidence is the angle between the incident ray and the normal to the surface.

• The angle of incidence is the angle formed by two parallel rays before they hit a surface.

• The angle of incidence is the angle between the reflected ray and the surface.

What happens to light when it reflects off a surface?

• Light travels in a straight line without changing direction.

• Light bends at the surface instead of reflecting.

• Light reflects off a surface according to the law of reflection, where the angle of incidence equals the angle of reflection.

• Light is absorbed by the surface completely.

Explain the difference between regular and diffuse reflection.

• Regular reflection is only seen in mirrors, whereas diffuse reflection is seen in all materials.

• Regular reflection produces clear images, while diffuse reflection scatters light and does not produce clear images.

• Regular reflection occurs only on smooth surfaces, while diffuse reflection happens on rough surfaces.

• Diffuse reflection creates clear images, while regular reflection scatters light.

What is refraction of light?

• Refraction of light is the scattering of light in all directions.

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

• 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 absorption of light by a medium.

How does the speed of light change when it enters a different medium?

• The speed of light decreases when it enters a denser medium.

• The speed of light is faster in water than in air.

• The speed of light increases when it enters a denser medium.

• The speed of light remains constant regardless of the medium.

What is the angle of refraction?

• The angle of refraction is always 90 degrees.

• The angle of refraction depends on the refractive indices and the angle of incidence.

• The angle of refraction is independent of the angle of incidence.

• The angle of refraction is equal to the angle of reflection.

State Snell's law of refraction.

• n1 / n2 = sin(θ2) / sin(θ1)

• n1 * tan(θ1) = n2 * tan(θ2)

• n1 + n2 = sin(θ1) + sin(θ2)

• n1 * sin(θ1) = n2 * sin(θ2), where n1 and n2 are the refractive indices of the two media, and θ1 and θ2 are the angles of incidence and refraction, respectively.

What is total internal reflection?

• Total internal reflection is the complete reflection of a wave at the boundary of two media when the angle of incidence exceeds the critical angle.

• Refraction of light at the boundary of two media

• Absorption of light in a medium

• Reflection that occurs only at a 90-degree angle

Describe the critical angle.

• The critical angle is the angle at which light enters a medium and bends away from the normal.

• The critical angle is the angle at which light is absorbed by a medium without any reflection.

• The critical angle is the maximum angle of refraction when light passes from a less dense to a denser medium.

• The critical angle is the angle of incidence at which light is completely reflected within a medium, occurring when it passes from a denser to a less dense medium.