Chemistry plays a crucial role in how photographs and images are created using film.

Photography is based on chemical reactions initiated by light. The chemical processes that create a traditional film photograph start inside the camera with the absorption of photons (the individual particles of light). However, photochemistry alone is not able to produce an image. Development is continued through chemical reactions. The result is either a negative image that can be used to make a print, or a positive image that we call a slide.

Modern photography captures the image digitally using semiconductor electronic devices.

Digital images are assembled from millions of individual electronic pixels.

Join Cal ACS at the Solano Stroll on Sunday, September 8th

Look for our booth at the corner of Solano Avenue and Fresno Avenue in Berkeley.

We’re still looking for a few volunteers to help out in the booth!

Science in the Park returns to Cal State University EastBay in Hayward on Saturday, October 5th

Calling all Cal ACS outreach volunteers!

Click HERE to learn more about photography and find instructions for fun, safe, hands-on activities.