Choose an object which will make a shadow. Move the object nearer or further away from a light source. Measure the length of the different shadows. You could record your findings in a table like this.

How Light Casts a Shadow This phenomenon emerged from an innovative experiment led by researchers ... Content may be edited for style and length. Like these kind of feel good stories?

In their experiment, a powerful green laser beam passed through a ruby crystal, locally altering its response to lateral blue light. The result: a visibly darker region, akin to the shadow of a ...