1. 004 Polarization 2C1 Why Do We Need Two Eyes? 027 Stereo Glasses
032 Magic Eye
036 Visual Illusions

2. Investigating Polarization
Created for CVCA Physics by
Dick Heckathorn
18 May 2K+3

3. Investigation Polarization
a. Look through a single polarizer.
b. Rotate the single polarizer.
Is there any intensity changes?
c. Look through two polarizers.
d. Slowly rotate filter near your eye
Is there any intensity changes?

4. Demonstration
Waves Through A Board

9. Investigation Polarization
e. Slowly rotate filter further from eye
Is there any intensity changes?
f. Place a third filter between the two.
Does any light get through?

10. Investigation Polarization
g. Position pair of filters for minimum light
Place the third filter at 45o between two.
Does any light get through?

13. Do the polarize side windows provide privacy?
Would you do this on your home?

14. Demonstration
Sun glasses
Cellophane

15. Demonstration
Is reflected light polarized?

16. IIC1 Why Two Eyes
Page 26

17. IIC1 Why Two Eyes
1. Place a sharpened pencil in each hand and hold them apart at arm's length so that the sharpened ends face each other.

18. IIC1 Why Two Eyes
Now with both eyes open, bring the pencils slowly toward each other and try to touch the points together.
Describe what happens.

19. IIC1 Why Two Eyes
2. Now try the same thing but do it with only one eye open. Describe what happens.
Is this harder than Step 1? Explain your answer.

20. IIC1 Why Two Eyes 3. Look around the room with both of your eyes open.
Look at some object in the room and then close one eye.
How far does it move relative to the background?

21. IIC1 Why Two Eyes
Now close the other eye. How far does it move relative to the background?
Describe how it is different from the view with two eyes.

22. IIC1 Why Two Eyes
4. Hold a pencil at arm's length so that it is vertical.
With your left eye closed, look at the pencil and line it up with some object across the room.

23. Without moving the pencil, look at it with your right eye closed.
IIC1 Why Two Eyes
Without moving the pencil, look at it with your right eye closed.
Does the pencil still look lined up with the same object?
If not, what is it lined up with now?

24. IIC1 Why Two Eyes
5. Do Step 4, but this time have the pencil about 6" from your face.
Did the pencil appear to shift its position more or less than it did in Step 4?

25. IIC1 Why Two Eyes
6. Can you give a reason why two eyes help us to determine distance more easily than one eye?

26. IIC1 Stereo Glasses 8. Use the stereo viewers to look at the squares.
Should you see three, concentrate on the one in the center.

27. Should look the same distance away.
IIC1 Stereo Glasses
Do the square and circle both look the same distance away or does one appear closer?
Should look the same distance away.

28. IIC1 Stereo Glasses Look at the squares through the viewer.
Does the circle seem to be at a different distance than the square?
If so, is the circle closer / further away?

29. IIC1 Stereo Glasses 10. Predict what you will see.
Does the circle seem to be at a different distance than the square?
If so, is the circle closer / further away?

30. IIC1 Stereo Glasses
11. Can you explain these results in terms of the different view each eye has?

31. IIC1 Stereo Vision/Magic Eye
1. Read the article titled:
“Can You See If?

32. IIC1 Stereo Vision/Magic Eye
2. Look at black and white:
“Magic Eye”.
Can you see the 3-D image?

33. IIC1 Stereo Vision/Magic Eye
Best Reference
Stereogram
ISBN:

34. IIC1 Stereo Vision/Magic Eye
4. Newspaper Magic Eye

35. 6 6 l 5 N 6 5

36. IID1 Visual Illusions
What Animal Is It?

37. IID1 Visual Illusions
Rotating Window

38. IID1 Visual Illusions
Dice

39. PARIS
IN THE
THE SPRING

42. Equipment ___ Polarization Box L-13 ___ Optical Illusion Box
___ Rotating Rotor Box L-5a
___ Handout 27-2 page (Honors only)
#3 Waves through board
#6 Three polarizers
#14 Sun Glasses, cellophane
___ #18 Handout Why Do We Need Two Eyes
___ #28 Handout Using Stereo Viewers
___ #28 Stereo Viewers
___ #33 Handout Can You See It?
___ #35 Books with orange tag on bottom
___ #36 Handout Newspaper Magic Eye (B and W)
___ #38 Animal
___ #39 Rotating Window
___ #40 Dice
___