Particle Tracks and Relativity    

    Teachers' Results 

You can use rulers and compasses to draw and measure a circle that fits the first part of the track, but we have drawn and fitted the circles with a computer drawing programme (see the picture, not to scale!)

These are our results for the blue circle: 

measured radius = 5.3 cm

with a magnification factor of g = 0.67,

this gives

real radius = 5.3 cm / 0.67 = 7.9 cm.

You can also try another geometrical procedure to calculate the radius if you click-me (PowerPoint).