How to: separate rays (the theoretical constructs) from beams (the physical); connect the predictions of ray models back to...

Teaching Guidance 11-14

Once a ray diagram has been drawn to represent a particular event, it can then be used to predict what will happen if any...

Teaching Guidance 11-14

Beams are what pupils see using lamps, slits and all the other apparatus on the laboratory bench top. Rays and ray drawings...

Teaching Guidance 11-14

When pupils draw ray diagrams in their books you should insist on three things:

Teaching Guidance 11-14

The devices used to cast narrow beams of light across bench tops are often referred to as ray boxes . That cannot be helpful...

Teaching Guidance 11-14

There's a good chance you could improve your teaching if you were to try these strategies...

Teaching Guidance 11-14