From the description on General Electric's Instagram site: Solar cell research at GE dates back to the 1930’s, beginning with early experiments with photocell sensors. In the1950‘s GE perfected, and began marketing small photovoltaic cells.
Pictures abound on the Internet, try searching your favorite social media site for a science topic and visual keywords such as:
Copyright free images can be found on the Internet in a variety of ways. One easy way to search for images you can reuse without asking permission is to search for a government entity that publishes photographs on the Internet. United States government publications can be reused when proper credit is given to the source. Search Google for government sites by adding the words
site:.gov
(site colon dot gov)
to any search string. Find some government photo streams here:
The Digital Commons Network by Bepress gives access to free, full-text, scholarly articles available from over 275 educational institutions. The different colors of the Digital Commons' color wheel represent subjects.
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