1. 10/22 & 10/23 - 7 th Grade Agenda Payday Collect: HW: Reading & Note Taking : p. 45 & 47 Eye & Optical Tools Chap 2 Study Guide Video: Bill Nye Eye ball Class Reading: p. 65- 69 HW: Reading & Note Taking : p. 48 & 50 Reminder Chap 2 Test on 10/27 & 10/28

2. Parts of the Eye

3. Rods and Cones Rods responds to light Cones respond to color

4. Nearsightedness

5. Farsightedness

6. Galileo’s Telescope He was the first man to observe the moons of Jupiter and craters on the moons with a telescope in 1608

7. What is a Refracting Telescope? A telescope that uses convex lenses to gather a large amount of light onto a small area

8. What is a Reflecting Telescope? A telescope that uses mirrors to focus a large amount of light onto a small area

9. What is the difference between refracting and reflecting telescope?

10. What is a Radio Telescope A telescope that uses curved, reflecting surfaces to concentrate faint radio waves from outer space onto small antennas

11. Four views of the Crab Nebula using different telescopes

12. Microscope A Microscope uses a combination of lenses to form enlarged image of tiny objects

13. Electron Microscope Electron microscopes uses electrons instead of light to produce a magnified image

14. More Optical Illusions

20. Optical Illusion Video