Go Back   Steve's Digicams Forums > Digicam Help > Newbie Help

Thread Tools Search this Thread
Old Feb 27, 2010, 6:50 AM   #31
Senior Member
iowa_jim's Avatar
Join Date: Jan 2010
Location: North Central Iowa
Posts: 589

I saw mention of using two polarizing filters to futher adjust the light coming through, and this reminded me of an effect my high school physics teacher showed us to illustrate the particle vs. wave nature of light.

One polarizing filter will cut the light that is oscillating in a certain direction, or range of directions, advantageous when light is bouncing off the surface of water causing glare, etc.

Anyway, take a second polarizing filter with it's filter at 90 deg to the first, and it blocks 100% of the light coming through. No surprise yet, but...

Take a third polarized lens, insert it between the other two with its filter oriented at 45 deg and light will pass through.

The reason for this was explained as, aw heck I'll just shut up now. But its pretty neat to see. Now I have to get some filters and show my kids...
iowa_jim is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 5:53 AM.