EXPECTATIONS -- Before we start this unit you should:

• realize that light has both wave-like and particle-like properties
• the speed of light in a vacuum is 3.0 x 10⁸ m/s
• the speed of light decreases as light travels through a denser medium

LEARNING TARGETS:

→ I will be able to demonstrate understanding that all <normal matter> in the Universe does at least one of the following:

emits light

reflects light

absorbs light

refracts light

→ I will be able to utilize the relationship between the speed of light in one medium compared to the speed of light in a neighboring medium to calculate the index of refraction of that medium:

c/v = n

(where c = the speed of light in the first medium, v is the speed of light in the neighboring medium and n is the index of refraction)

→ I will be able to utilize Snell's Law to analyze refraction using the following formula:

sinθ₂/sinθ₂ = n₁/n₂ = v₂/1₁

where v₁ and θ₁ are the velocity and angle of the incident light ray and v₂ and θ₂ are the velocity and angle of the refracted light ray (NOTE: This is NOT the precise form of Snell's Law but it is a variant that you need to be very comfortable with)

→ I will be able to utilize Snell's Law to calculate the critical angle for a light ray moving between two media (if it exists!)

→ I will be able to demonstrate understanding of the Law of Reflection by applying principles of retroreflection in our everyday life

→ I will be able to trace light rays moving into, and reflecting out from a convex mirror

→ I will be able to trace light rays moving into, through, and out from a concave mirror

→ I will be able to apply the mirror equation (1/o + 1/i = 1/f) to various scenarios

→I will be able to trace light rays moving into, and reflecting out from a concave mirror

→ I will be able to trace light rays moving into, through, and out from a concave lens

PHENOMENA:

♥ Why are the owl's eyes red in Blade Runner?