1. 2P Optics Study notes

2. 1. What is Light? Light is Energy. Light is Wave (Electromagnetic) Light is a Particle (Photon)

3. 1. What are the different ways that light is produced Incandescent Florescent lights are more efficient than incandescent Phosphorescent Light (Glow in the Dark) Electric Discharge Bioluminescence

4. 2. What are the two laws of reflection –The angle of incidence is equal to the angle of reflection –The incident ray and the reflected ray all lie in the same plane.

5. 3. Light Interactions Diffraction: Wave bends around corners Dispersion: Light Spreads out (White Light into a RAINBOW) Reflection: Light bounces (Angle of Incidence equals Angle of Reflection) Refraction: Light slows and bends when it enters a new medium (air  Glass)

6. 4. Electromagnetic Spectrum Radio Waves Microwaves Infrared Visible Ultra Violet X ray Gamma Ray

7. 5. Colors of the rainbow are in the Visible Spectrum Red Orange Yellow Green Blue Indigo Violet

8. 4a. Primary Colour of Light RED GREEN BLUE R+G+B=White This is additive because the colors combine to make new colours.

9. 4b. What are the primary colours of paint, pigments and dyes. Yellow Cyan Magenta This is subtractive because red, green and blue light is absorbed. Black is when no light is reflected.

10. 4c. How the Eye Works. Rods and cones are special cells in your eye that process light. Rods help us see black and white and shades of grey. Cones help us see color. You have 3 kinds of cones – they process red, green, and blue.

11. The Colour Wheel for light Cyan= Blue +Green Magenta = Red + Blue Yellow = Red + Green White = R + G + B Two Colours that make white light C + R = B + G + R = W (Cyan + Red make White) also B + Y = W and M + G = W

12. 11. Plane (flat) Mirror

13. 4d. Subtractive Colour Theory Cyan Pigment absorbs_________ Paint appears to be ___________ __________ light, made of R & B _ _______ M R B blue

14. 4d. Subtractive Colour Theory Blue Filter absorbs ____________ light Cyan Light is made up of _______ and ______ Yellow (R + G) B G Blue Light

15. 5.Difference between Luminous and non Luminous Luminous Emits it own light (Sun) Non Luminous reflects light (moon)

16. 6. SALT SIZE ATTITUDE LOCATION TYPE SALT is used to describe an image.

17. 7. image in a Concave Mirror when the object is beyond C V CF PA Size: small Attitude: inverted Location: in-front Type: real

18. image in a Concave Mirror when the object at C V CF PA Size: same Attitude: inverted Location: in-front Type: real

19. image in a Concave Mirror when the object is between C and F V CF PA Size: larger Attitude: inverted Location: in-front Type: real

20. image in a Concave Mirror when the object is at F V C F PA NO IMAGE!! (Light Rays do not Intersect or Appear to Intersect)

21. image in a Concave Mirror when the object between F and V V CF PA Size: larger Attitude: upright Location: behind Type: virtual

22. 8. Convex (diverging) mirror. V C F PA 1. Size: small Attitude: upright Location: behind Type: virtual

23. 2. Name one difference between a convex (diverging) and concave (converging) mirror. The difference between a convex and concave mirror (beside their shapes) is that the concave mirror can produce a real or virtual image and a convex can only produce a virtual.

24. 3. Give one use for a convex mirror. Security Mirror Makeup mirror Etc

25. 4. A convex mirror Always produces a Virtual image (located behind “inside” the mirror)

26. 9. Give one kind of optical instruments that contain a lens? Glasses Camera Overhead Telescope Microscope Contact lenses etc…

27. 9b. Image in a Converging Lens when the object is beyond C 2FF PA F Size: small or same or larger Attitude: upright or inverted Location: behind or in-front Type: real or virtual

28. 9b. The image in a Diverging Lens Size: small Attitude: upright Location: in-front Type: virtual

29. STUDY HARD AND GOOD LUCK ON THE EXAM