Photo 1, Q1:
The Eye and Eye Chart experiment,
the following Power Point from class will be on the next quiz:
Q: Why does higher aperture, (smaller opening-less light) make an image sharper?
A: A smaller aperture reduces aberrations, extra reflections, which cause the image to appear soft even at the plane of focus. The larger the aperture, the more light is let in, the more disorganized the light is, the blurrier the image.
Download The Eye and Camera Parts Show:
Download The Eye and Camera Parts Show to PRINT:
Take off your glasses and check your vision:
The chart below was projected largely on the whiteboard for the class to conduct this visual experiment:
1) Using one eye-your eye with the poorest vision, what is the lowest line you can read up to with fairly correct results?
2) Using the same eye, look through a small aperture (hole), (we poked a little hole with a paperclip in black paper in class and looked through it) and now record which is the lowest line you can read clearly. What was the lowest line you can read looking through the hole?
3) How has the vision changed?
4) Why do you think your vision has changed?
We will discuss our theories in class!
If you were absent for this experiment, come to extra help and we will do this together, or try it on your own and write a paragraph about your findings answering the questions above.