Christian Mattoon
Tuesday, December 20, 2011
How can i find the focal length of the lens in my flashlight?
The flashlight i have moves in and out of focus as i twist the cap. The light gradually gets more and then less condensed. Is there any way i can find the focal length of the lens in it?
No comments:
Post a Comment
Newer Post
Older Post
Home
View mobile version
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment