Question

what are 3 changes light energy can cause

Answer 1

Since this is not my area of expertise, I searched Google under the key words "changes light energy" to get this source:

http://answers.yahoo.com/question/index?qid=20080929194151AAoe5VQ

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.