Hello everyone,

 

Why do looking at things with one eye closed through a small hole like microscope make the object look clearer. Someone told me it gives less abberation. Then I checked it online and it said different wavelengths converge at different points in a lens. Ok I understand why that would create a blurred image, but I don't understand why looking at objects as the way I describe create less abberation. Thanks

Pinholes give images; the virtue of the small hole is that rays that are off-axis — and would blur the result — are blocked.

 

http://www.howstuffworks.com/question131.htm

Pinholes give images; the virtue of the small hole is that rays that are off-axis — and would blur the result — are blocked.

 

http://www.howstuffworks.com/question131.htm

 

Thanks swansoft Why does pin hole block rays off axis? I mean light still has to pass through pupil, so isn't it the pupil that can block this?

Edited April 26, 201015 yr by scilearner

The pin hole is small, so the off-axis rays don't go through it. If the pinhole's in the middle of a piece of metal, the off-axis rays strike the metal instead of going through the hole.