WindsorElectronicsInc Vintage Radiometer SpaceAge Sphere Glass Solar Motor Window Decoration Science Toy

" The light from the sun controls our very existence. Without it, the world would be a lifeless sphere. Because of it, life abounds, and we enjoy the marvels of a modern civilization. In his search to control light, man has uncovered many of its wondrous properties. Among them... Light releases its energy in the form of heat, called infrared radiation. You feel this energy, for example, from the heat of a lighted match, or from the warmth of the sun. This same radiation is the key to movement in the Radiometer. (The Radiometer does not work under fluorescent lamps, since there is no heat developed by this kind of bulb). " -WindsorElectronicsInc

Online Store(EBay); https://www.ebay.com/itm/396103424884?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20220405142716%26meid%3D182491b07c72475bbf3bd16555f4dc9b%26pid%3D101506%26rk%3D4%26rkt%3D10%26sd%3D286373731002%26itm%3D396103424884%26pmt%3D1%26noa%3D1%26pg%3D4481478%26algv%3DDefaultOrganicWebWithV11WebTrimmedV3VisualRankerWithKnnV3AndUltBRecall&_trksid=p4481478.c101506.m1851 Online Store(EBay); https://www.ebay.com/itm/205297977328?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20220405142716%26meid%3D182491b07c72475bbf3bd16555f4dc9b%26pid%3D101506%26rk%3D8%26rkt%3D10%26sd%3D286373731002%26itm%3D205297977328%26pmt%3D1%26noa%3D1%26pg%3D4481478%26algv%3DDefaultOrganicWebWithV11WebTrimmedV3VisualRankerWithKnnV3AndUltBRecall&_trksid=p4481478.c101506.m1851 Online Store(EBay); https://www.ebay.com/itm/286373731002?_skw=solar+radiometer&itmmeta=01JNBK60P4XTET84CVVRH4GKVA&hash=item42ad345aba:g:xYoAAOSwWCZnkEW2&itmprp=enc%3AAQAKAAAA0MHg7L1Zz0LA5DYYmRTS30lsZNo6gBmixo9E2aLjZkrpL5OAhquIy5HF8NcVmGx9YwG2I87CEpOBSmiJ2z9Pi6B75Z6Jy7306shGKdfrjUfVEAkOKzAjENVxdhq9BxT05myHWo6DhjIwFjYhChVJAUq21UvpbxrmsPqU7uhfzX2sQOzdqJ%2FnGBHVtIrlFr7ERJwkvUtcEkV6oOe2Uphh9fY0E5MmuA0S9nOuD7cg8fbWs14qMf3E6GF9xqiC6RlR2M8GY5rXZq92aGs%2FD4mghAw%3D%7Ctkp%3ABk9SR5aLmPOqZQ Product Review; " I first learned about radiometers in high-school science class, and it's inner workings confounded me, but apparently the exact reasoning behind how it works is still somewhat of a scientific mystery as well. Place the device on a windowsill in direct sunlight (or even just under a bright flashlight), and the vanes will begin to move, gaining momentum, until it's spinning quite fast. While particles of light do carry energy, they have virtually no mass, so moving something as heavy as the solar-vanes (and with instant observable motion) is truly a feat of nature, and sure to capture the mind of kids and adults alike ! " -MadeInUSAReview