Orbits are usually elliptical, this demonstrates an easy way to draw elliptical orbits that could represent orbits of planets...

Practical Activity 11-14

This demonstration is an easy way to show how gas molecules in the atmosphere scatter light to cause the sky to appear blue.

Practical Activity 11-14

Some digital cameras are sensitive to wavelengths of light that we cannot see with our eyes. This simple demonstration shows...

Practical Activity 11-14

Using a variable resistor and a light bulb, it is possible to demonstrate how the colour of a star is related to its...

Practical Activity 11-14

How to illustrate the life cycle of stars using a Hertzsprung-Russell diagram, a large sheet, and some students.

Practical Activity 11-14

Using a group of students as light waves, it is easy to show how light can be red and blue shifted when astronomical objects...

Practical Activity 11-14