Assess what your students already know; you may be able to move quickly through this material if you feel that your class is...

Teaching Guidance 16-19

Demonstration: A circular pulse started at one focus will be reflected as a straight pulse from the nearest part of the...

Practical Activity 14-16

Demonstration: Students may have done some ray optics with light using parabolic reflectors such as those in the back of car...

Practical Activity 14-16

Demonstration: You can use a ripple tank to introduce ideas about the relationship between an ‘object’ and its mirror ‘image’...

Practical Activity 14-16

Demonstration: This experiment is best done after students have used a ripple tank to experiment with a pulse reflected by...

Practical Activity 14-16

Demonstration: Good questions will encourage close observations of circular pulses in a ripple tank.

Practical Activity 14-16

Demonstration: Observing what happens when straight wave pulses are produced in a ripple tank.

Practical Activity 14-16

Demonstration: Some ripple tank experiments previously done with wave pulses can be repeated with continuous waves, either...

Practical Activity 14-16

Demonstration: A stroboscope makes it easier to see patterns of wave behaviour with continuous ripples in a ripple tank...

Practical Activity 14-16

Demonstration: This experiment shows the overlap of infra-red radiation, visible light and ultraviolet radiation, all produced...

Practical Activity 14-16

Demonstration: The point of these questions is to stimulate curiosity and to demonstrate that waves have some interesting...

Practical Activity 14-16

Demonstration: Use this experiment when introducing transverse and longitudinal waves. Later it might also be used when...

Practical Activity 14-16