Dear Friends & Educators
In these Science Snippets, I provide write-ups and a few short videos on activities that are effective, easy to do and that won't take too much time to prepare.
Education, in essence, is the sharing of our experience and knowledge.
It gives me great pleasure!
Carl Ahlers
Scientist & Educator
Measure the average speed of a moving object with your phone

The quick measurement of the average speed of a projectile or object can be very useful, especially in engineering when analysing the impact of design changes. Do you require special equipment? No! You have it in your hands - your mobile phone, packed with useful sensors.

Light: Photoluminescence, (phosphorescence & fluorescence)

Photoluminescence is the production of light without any heat, using high energy photons. As photons are light particles, this means we can produce light by stimulating a compound with light particles!

Light: Persistence of Vision

There are numerous oscillating objects, electromagnetic waves and flickering lights out there that cannot be observed by human sight. Our sense of sight is just not able to perceive and detect these fast changing images. In this snippet I will show you an easy way to expose this “secret world” to your students using a solar panel and speaker.  

The Cartesian Diver Lab

The Cartesian Diver is an age-old toy that demonstrates the principles of density and buoyancy. Students use soy sauce fishes and soft drink bottles filled with water. By changing the water pressure, they make the fish move up and down.