Black Light

 

Using a UV light to show up the invisible parts of bank notes enthused the students some claiming they hadn't seen a £50 note before and seeing that it was genuine. I was glad all the notes we looked at were genuine.

electrical conductivity

Busy day today with lots of experiments including using the @pascoscientific electrical conductivity meter to look at different salts and how their conductivity varied. Students thought best part was using the vortex mixer.

The Van de Graaff Generator and a Ping Pong Ball

The graphite covered ping pong ball moving charge from one sphere to another and making the little hair I have stand on end. The ping pong ball acts as a charge carrier allow the Van de Graaff generator to discharge, but the sudden discharge has a lot of force behind it, launching the ping pong ball away towards the smaller dome. #iteachphysics

Polarising lenses

Using polarising lenses to see the effect on light and effect that some solutions have on the light passing through. #iteachphysics

Diffraction of light through two pencils

Looking at a vertical edge and a horizontal edge through the gap of two pencils to observe the diffraction on light. The pencils are straight but they look bent in places as the light is diffracted #iteachphysics

Looking at Oil and Water refracting a pencil

 Looking at Oil and Water refracting a pencil and getting the students to work out the refractive indices. #iteachphysics

Vortex Mixer with food tests

I discovered that using the vortex mixer in doing food tests made a terrific difference, getting the food to dissolve in water to get much better test results.