Keith Ellis
More ideas from Keith
Trick to drawing ray diagrams for converging lens: There is one ray of light passing through the center of the lens. Always. 2 rays are enough to determine the position of image/object. The other ray of light ALWAYS passes through the focal point of the lens. Either the first focal point of the second focal point. If a ray passes through the focal point before passing through the lens, the refracted ray will be travelling parallel to principal axis. If a ray is parallel to principal axis...

Trick to drawing ray diagrams for converging lens: There is one ray of light passing through the center of the lens.

Download Hubble Ultra Deep Field 1920x1080 HD Wallpaper

Download Hubble Ultra Deep Field 1920x1080 HD Wallpaper

Light in the universe

is that can take on many forms. Radio microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation are all different forms of light. (Illustration: NASA/CXC/M.

speed of light travel time

speed of light travel times. We definitely need to fold space/time to create wormholes to get to where we want to go.