Description: Lecturers are Howard Losty, Managing Director of GEC Electronic Devices Ltd; Steven Cundy, Head of Optical Communications and Lamps Division, GEC Hirst Research Centre and Robert Clayton, Technical Director GEC Ltd (part 2).

Colour film opening with a short history of electricity and light generation. There is a short demonstration of light generation using apparatus of rotating coils between poles of a magnet with the generated current lighting the lamp.

Topics in this lecture include: the use of electricity and electrical devices for:

Producing light

Detecting light

Communicating with light

There are also detailed explanations covering light's properties including brightness, colour, speed, straight lines and wave motion.

Perception of light- explanation of how we see including a large scale model of a human eye to demonstrate this.

Artificial light sources with a description of filament bulbs, including a scene from a filament bulb production line in a factory and a description of phosphor coated lamps.

Light fittings and design- with detailed descriptions on how lamps are designed to fulfill their specific purpose.

Using light to produce an electric current with a discussion on photoelectric effects. There is also mention of solar energy and the shortcomings of this in the 1970s.

Finally it ends with a detailed explanation on electronic television camera tubes and transistors known as Large Scale Integrated Circuits.

Throughout there are demonstrations using easy to follow graphics and large scale models.