Khan Academy
Khan Academy: Waves and Optics: Virtual Image
Video lectures discusses virtual image and light rays. [7:52]
Khan Academy
Khan Academy: Simple Lens Law
In this video [2:07] we'll explore the algebra of light rays which are in focus.
Khan Academy
Khan Academy: Thin Lens Approximation
In this video [2:32] we'll explore what happens to light rays when they pass through a lens.
Khan Academy
Khan Academy: 3. Light Rays
Let's look more closely at how light bounces when it strikes an object. We'll cover reflected and refracted rays. Click here for more detail on refraction!
PBS
Pbs Learning Media: Communicating With Light
In this video [2:12], observe a group of children using light to communicate over a distance in this live-action video produced by WGBH. Use the video to observe strategies for using light to communicate across a distance as well as to...
Science Friday Initiative
Science Friday: Fifty Years Ago, a Bright Idea
Inventor Nick Holonyak describes the creation of the visible light-emitting diode, or LED. [12 mins. 2 secs.]
Mocomi & Anibrain Digital Technologies
Mocomi: How Does a Tube Light Work?
What is a tube light and what is its function? Find out in this brief animated video. [0:52]