5 in 5

• Name three parts of the eye• What part controls the amount of light that

enters the eye?• What is the name of the nerve that brings the

information captured by the retina to the brain?

• Give an example of light reflection• Give an example fo light refraction

Today:

• Review of the eye• More details regarding refraction and reflection• Lenses• In groups or individually, make a song about the

parts of the eye and how we can see

• HOMEWORK: – Using p. 106-116 answer p 118-119 numbers 15 to

21

SIGHT

Anatomy Review

To Recap…

• Iris:

• Cornea

• Lens

• Retina

• Optic Nerve

• Controls the amount of light entering the eye

• Protects the eye

• Adjusts to allow us to see from far and close

• Changes the light into a nervous impulse

• Sensory nerves that brings the impulse to the brain

Light

• Part of the electromagnetic spectrum• We can only see the visible portion of the

spectrum.• The higher the frequency, the more energy

the electromagnetic wave has.

• Infrared

• Radiowaves

• Visible Light

• X-rays

• Gamma Rays

• Microwaves

• Ultra violet

• Red

• Indigo

• Green

• Orange

• Blue

• Violet

• Yellow

Reflected or refracted?

• Reflection

Reflected or refracted?

• Reflection

Reflected or refracted?

• Refraction

But what does this have to do with sight?

• Light is refracted constantly in our eye to hit the retina perfectly

Divergent

Not the movie, the lens

Myopia

The concave lens/Divergent lens

Convergent

Hyperopia

The convex lens/Convergent

To recap8. Names the parts of the eye involved in vision (iris, cornea, crystalline lens, retina)

9. Describes the function of the main parts of the eye

7. Locates different areas on the electromagnetic spectrum (e.g. radio waves, visible light, X-rays)

8. Describes different applications of electromagnetic waves in the health care sector (e.g. X-rays, infrared optical imaging)

9. Describes how light rays are deviated by a plane reflective surface

10. Determines the angle of reflection of a light ray on the surface of a plane mirror

11. Describes how light rays are deviated when they pass through the surface of a translucent substance

12. Determines the focal point of concave and convex lenses

13. Describes the relationship between the focal point of a lens and the degree of deviation of light rays in different situations (e.g. accommodation of the crystalline lens, choice of corrective lenses)