The purpose of this experiment was to determine what spectacle lens material and/or tints and coatings best absorbs ultraviolet (UV) light.
http://www.selah.k12.wa.us/SOAR/SciProj2000/BryanG.html
This activity is designed to give students a better understanding of what parallax is, and to gain some experience in using it. We would already have talked about parallax in class, and seen some simple examples of it.
http://www.ofcn.org/cyber.serv/academy/ace/sci/cecsci/cecsci088.html
Have you ever wondered what makes a star twinkle? On the next clear night look at a bright star. How many blinks does it make in 10 seconds? Look at the moon, an airplane or a bright planet at night. Do these objects twinkle?
http://quest.arc.nasa.gov/lfm/events/starcensus.html
With a lens,you can bend light to makes pictures of the world.
http://www.exploratorium.edu/science_explorer/pictures_from_light.html
This experiment shows how you can use normal CD-ROM to decorate your white walls with rainbow colors!
http://www.exploratorium.edu/science_explorer/reflecting_rainbows.html
Build a mirrored tube that lets you see around corners and over walls.
http://www.exploratorium.edu/science_explorer/periscope.html