WARM UP: WRITE OUT THE QUESTION OR RESTATE IN YOUR ANSWER.

1. Name the two types of Mechanical waves.

2. Sound is what type of wave?

3. Name the 3 bones of the inner ear.

4. Transverse waves move _______ to the disturbance/energy.

5. Compressional waves move___________ to the disturbance/energy.

LIGHT WAVES, ELECTRO MAGNETIC

SPECTRUM, VISIBLE LIGHT, AND THE EYE

ELECTROMAGNETIC WAVES

•Waves that DO NOT require a medium for the energy to travel

•Examples: Light, radio waves, x-rays, gamma rays

•All waves on the electromagnetic spectrum

ELECTROMAGNETIC WAVES

•Difference between the different waves is wavelength

•EM (Electromagnetic) spectrum illustrates the differences

LIGHT WAVES

• Transverse wave that carries energy

•Visible light only makes up a TINY fraction of the electromagnetic spectrum and makes up the colors of the rainbow humans see on a daily basis.

LIGHT...WHAT IS IT? •Light Energy•Atoms•As atoms absorb energy, electrons jump out to a higher energy level.•Electrons release light when falling down to the lower energy level.

•Photons - bundles/packets of energy released when the electrons fall.

•Light: Stream of Photons

THE EYE• Let’s explore the eye!

• http://www.yorku.ca/eye/eye1.htm

• Pupil-

•Cornea-

• Lens-

•Retina-

• Sclera-

• Iris-

•Optic nerve-

ANATOMY OF THE EYE

HOW THE EYE WORKS

•Video

•Are you left eye or right eye dominant?

•So what exactly are we looking at….

REFLECTION VS. REFRACTION

REFLECTION

• Light reflects off a surface at the same angle, it hits it

REFRACTION

• Refraction is when waves speed up or slow down due to travelling in a different medium.

• Below, the light rays are slowed down by the water and are bent, causing the ruler to look odd. The two mediums in this example are water and air.

• Let’s see what happens!

LIGHT AND COLOR• During the video complete this graphic organizer in your

notebook

Main Idea

DetailsVocabulary Terms

Diagram

•Visible light only makes up a TINY fraction of the electromagnetic spectrum and makes up the colors of the rainbow humans see on a daily basis.

•The lowest energy and frequency of visible light is red and…

•the highest energy and frequency is violet

ELECTROMAGNETIC SPECTRUM• Visible Spectrum – Light we can see

• Roy G. Biv – Acronym for Red, Orange, Yellow, Green, Blue, Indigo, & Violet.

• Largest to Smallest Wavelength.

TICKET OUT THE DOOR

•What is the difference between a reflection and a refraction of light?

•Name two differences between light and sound.