Elenco Solar Energy - Manual (Page 7)

6
Experiment no. 7 Solar heater and reflected light
Perform Experiment 6 again, exactly as you did
before, but this time take a mirror and stand it
at a distance from the solar heater in such a way
that it reflects the sunlight onto the solar heater.
The latter will now absorb the direct sunlight as
it did before, and, in addition, it will received
some reflected energy from the mirror.
The warm water at the top of the heat absorber bag
will be hotter than in the last experiment (Exp 6).
Experiment no. 8 Solar heat can be reflected
Place the thermometer on the window sill so that it
is shielded from the sun by the card. Record the
temperature reading.
Now hold your mirror in such a way that the sun’s
rays are reflected from the mirror onto the
thermometer tube. Take a new reading after several
minutes. The temperature should now read practically
the same temperature as it would read if it were facing
the sun directly.