Optics Tutorial - 8 - Cardinal Points
11:50
YouTubeopticsrealm
Optics Tutorial - 8 - Cardinal Points
Details on thick lens cardinal points (focal, principle, nodal and anti-principle points). We discuss what they are and how to locate them within a thick lens. Also shows how a multi-element complicated optical assemblies also has cardinal points. Homework at http://www.opticsrealm.com/tutorials-and-videos/geometric-optics-video-lecture ...
56K viewsDec 6, 2012
Cardinal Bird
10K reactions · 5.8K shares | The real 'Angry Bird' #birdfy #birdslover #funnybirds #birdwatching #cardinal #birdsbirdsbirds #UnitedStates | Birdfy by Netvue | Facebook
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10K reactions · 5.8K shares | The real 'Angry Bird' #birdfy #birdslover #funnybirds #birdwatching #cardinal #birdsbirdsbirds #UnitedStates | Birdfy by Netvue | Facebook
FacebookBirdfy by Netvue
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5.3K reactions · 133 shares | Adopt a Northern Cardinal plush and treat yourself or your loved one to a gift this Valentine’s Day! You’ll receive a plush bird and certificate of adoption with your gift. Adopt by 2/4 to ensure your plush bird and certificate are delivered in time for that special birder in your life for Valentine’s Day. | National Audubon Society | Facebook
FacebookNational Audubon Society
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0:31
8K reactions · 625 shares | A favorite bird to many, the Northern Cardinal brightens everywhere it goes with its flare of crimson feathers. Take one home today and make a symbolic adoption to support birds and the places they need. You’ll receive a plush Northern Cardinal and certificate of adoption with your gift! | National Audubon Society | Facebook
FacebookNational Audubon Society
450.7K views1 week ago
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