19 reactions | Did you know eclipse glasses have an expiration date?! It turns out they do, so if you’re getting ready for next week’s annular eclipse make sure you pick up new ones or build your own pinhole camera like physics professor Todd Duncan does here. Directions from the August 2017 Eclipse are available at pacificu.edu/eclipse. ☀️ | Pacific University | Facebook

4.9K views · 21 reactions | Experimenting is the name of the game with this DIY project. Sam breaks down what a camera obscura is, how to make your own pinhole camera, and how to use it! | B&H Photo Video Pro Audio | Facebook