A visual and auditory demonstration of shifted frequencies.
Classroom Activity 14-16
In this activity, students get to explore possibilities to find out why a refracted beam follows the path that it does. They...
In this activity, students get to explore why a reflected beam follows the path that it does. They use a physical model to...
Here we're looking at how stretching space predicts the change in recession velocity of galaxies. If you stretch a piece of...
As you add a thickness of absorber, so the power in a beam decreases by a constant fraction. This leads to an exponential...
Bats see somewhat differently from us–they see with sound. They also actively sense their environment, unlike humans. We see...
Diagnostic questions relating to sound and light waves.
Diagnostic Questions 14-16
In this activity you can introduce students to the idea that energy can be shifted in small chunks. This is particularly...
Linking activity in the laboratory with a photon description.
This activity is all about hearing photons arrive, one by one. Draw out the random nature of their arrival, and the fact that...
This is a rather fine review activity, and should be undertaken towards the end of an introduction to the idea of photons.
Diagnostic questions exploring the understanding of lighting as a stream of photons.
Recognising and celebrating outstanding contributions to the field of physics education.