Got a 2 meter magnifying glass?

stupid question: why cant we focus a beam like that or larger into something (water?) to create energy for use?
 
stupid question: why cant we focus a beam like that or larger into something (water?) to create energy for use?

We already have solar panels that turn solar energy into electricity. Having a giant mirror would take up just as much space as having a giant array of solar panels.

There are also solar water heaters: Energy Savers: Solar Water Heaters

The main point that's misleading is the mirror only increases the energy density, not the actual energy.
 
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