UNIT 08 - Optics

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 of the Law of Reflection by applying principles of retroreflection in our everyday life

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 trace light rays moving into, through, and out from a convex lens

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

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

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:

v2sinθ1 = v1sinθ2

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)

PHENOMENA:

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

There Once Was a Lady Named BRIGHT

Who Traveled FAR FASTER than Light

She Set Out One Day

(In a relative way)

And Came back the PREVIOUS night!