Question

How can a solid be thermally transparent?

Answer 1

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How can a solid be thermal transparent..??

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Thermal cameras design to image wavelength between 7 to 14 use lenses made up of zinc sulphide zinc selenide or various call course day night glasses all of this lenses made of granny I'm a various calculi glasses all of this lenses materials of solid substances by the practically transparent to thermal radiation at the black body temperature where they operate..


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Answer 2

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This is that when the heat is passed through the solid there is not effect on it and hence it is transparents thermally.