Modeling convex and concave spherical lens from two fragments of spheres (for the main surface of the lens) and a thin cylinder between them used to close the internal space of the lens.
Fiber Optic audio cable. Designed to transfer high quality digital surround sound signals with no degradation. UL CL2 rated for in-wall installations. ROhS rated.
Ray tracing diagram for a converging lens, with the object inside the focal length. (yes, the light actually bends at both surfaces, not the middle of the lens...) This video was made with a Samsung Document Camera (pretty much a digital video camera on a stick)
Physics: Introduction to the optics of lenses and mirrors. Concave, convex, converging, diverging; real, virtual; upright, inverted, magnified, shrunk. Sign conventions for focal length, image distance, object distance, magnification. The lens/mirror equation; the magnification equation. Introduction to ray tracing. This is arecording of a tutoring session, posted with the student's permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: www.freelance-teacher.com For printable documents containing the "handout" and problems discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: www.youtube.com (1) The lens/mirror equation. Focal length distance, object distance. Convex, concave, diverging, converging (2) Image distance. Real, virtual (3) Continued. Magnified, shrunk (4) Continued. Upright, inverted (5) Continued. Magnification equation (6) Continued. The lens/mirror chart (7) A problem (8) Continued. Ray tracing (9) Continued (10) Another problem (11) Continued