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The heliostat, or array of mirrors, moves so as to keep the sun's rays focussed on the top of the solar tower.

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Q: Why does a heliostat used in a large solar furnace need to move whilst the furnace stays stationary?
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Why does a heliostats used in a large solar furnace need to move whilst the furnace stays stationary?

The heliostat, or array of mirrors, moves so as to keep the sun's rays focussed on the top of the solar tower.


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The sun moves, so the mirrors have to move to keep the reflected sun spot centered on the furnace. Moving the furnace would be poorer and more difficult


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