This ebook version of Oliver Optic's Plane and Plank, or, The Mishaps of a Mechanic has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's Living Too Fast has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's Taken By The Enemy has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's Within The Enemy's Lines has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's Stand By The Union has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's A Victorious Union has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

This ebook version of Oliver Optic's An Undivided Union has been made available in multiple formats by the Open Library. Editions of the full novel, organized by year of publication, may be accessed here.

An optical illusion that demonstrates the effect of eye movement on perception.

Read about the technological advances that brought on the information age at the beginning of the 21st century. The internet, e-mail, and the spread of fiber-optic cables revolutionized the amount of information available to the ordinary...

Four postcard-sized optical illusions that can be used to demonstrate how patterns and color influence perception.

An optical illusion that demonstrates the effect of eye movement on perception.

A drawing and measuring activity to give students an appreciation of magnitude in powers of ten, and of microscopes. Students draw themselves and an object life-size, and then examine smaller and smaller pieces of their picture.

Wow! A great page full of different experiments to illustrate the phenomena of optical illusions...and then it explains what is happening!

An image of "Air (Optics)", created by Jan the Elder Brueghel in 1621 (Oil on copper, 45 x 65 cm).

Understand how our brain identifies an object, view six optical illusions and explain why the visual system might interpret them the way it does.

Several short descriptions of demonstrations pertaining to polarization principles. Suitable as a supplement for a teacher lesson plan or as an idea-generator for a student project.

Find out the magic of mathematics. On this site you will find magic tricks, games, animated optical illusions, paradoxes and a lot more.

Andrew Vanden Heuvel unravels the details of focus, distance, and proportion that contribute to the mystifying optical illusion. [4:09]

In Spanish. Have fun with the different pictures and their optical illusions.

This optical phenomenon was observed for the first time on the wall of a cafe in Bristol.

Put a new spin on blending colors by creating your own spinning top. Mix colors through motion and make this optical illusion spring to life.

A short biographical sketch on the life and work of Augustin Fresnel (1788-1827). Comments on a few of his scientific accomplishments.

Use this picture to create a color reversing illusion. Great for projects and presentations.

This site from ScienceWorld provides a short biographical sketch of Augustin Fresnel (1788-1827 CE) and describes his most notable scientific discoveries and contributions. Links are provided throughout for additional information.