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 Light reflects off a surface at the same angle, it hits it 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 Vocabulary Terms Details Diagram Main Idea During the video complete this graphic organizer in your notebook Vocabulary Terms Details Diagram Main Idea

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.

What is the difference between a reflection and a refraction of light? Ticket out the door What is the difference between a reflection and a refraction of light? Name two differences between light and sound.