Graham’s Law is one of classic gas laws you learn about in AP or college physics but despite its apparent…

# How everybody can measure the size of the Earth

It may seem that measuring the Earth is a feat best left to the experts with modern technology. Or it…

# CO2 escapes a balloon faster than helium! – when Graham’s Law doesn’t apply

I thought it would be nice to do a little demonstration about the relative sizes of different atoms and molecules.…

# Quantum polarization, Dirac notation and erasure – Quantum Basics 3 of 3

Quantum Basics 1 of 3 Quantum Basics 2 of 3 Quantum Basics 3 of 3 Quantum mechanics is easy to…

# Quantized energy levels DIY photovoltaic effect with LEDs – Quantum Basics 2 of 3

Quantum Basics 1 of 3 Quantum Basics 2 of 3 Quantum Basics 3 of 3 Quantum physics gets it’s name…

# Double slit DIY Diffraction – Quantum Basics 1 of 3

Quantum Basics 1 of 3 Quantum Basics 2 of 3 Quantum Basics 3 of 3 You might think that experiments…

# Lunar Eclipse 2015 – How Far Is the Moon Redux

So I measured the distance to the moon again using a modified version of the project I outlined here. In…