Lesson 3. Refraction and Lenses

The change in direction of a wave as it changes speed while moving from one medium to another.

• Law of reflection

• Transmission

• Refraction

A transparent object with at least one curved side that causes light to change direction.

• Convex mirror

• Concave mirror

• Lens

• Iphone

A lens that is thicker in the middle than at the edges.

• Plane mirror

• Convex lens

• Concave lens

• Lego

A lens that is thicker at the edges than in the middle.

• Plane mirror

• Mirror

• Concave lens

• Convex lens

Example of a CONVEX lens...

• Magnifying glass

• Flashlight lens

• iPhone screen

Example of a CONCAVE lens...

• Magnifying glass

• Flashlight lens

• iPhone screen

Waves with shorter wavelengths travel at greater speeds and refract less in a material than waves with longer wavelengths.

• TRUE

• FALSE

Which color travels the slowest and refracts the MOST through a medium

• Red

• Blue

• Violet

• Orange

Which color travels the fastest and refracts the LEAST through a medium

• Red

• Blue

• Violet

• Orange

The ... refracts entering light.

• IRIS

• CORNEA

• RETINA

• OPTIC NERVE