Posts Tagged ‘reference’

Book Lamp

A lamp is moved from 90 cm to 30 cm above the pages of a book.? Compare the illumination on the book before and after the move. 100 candela 220 candela 290 candela 320 candela Compare the illumination on the book before and after the move. 100 candela 220 candela 290 candela 320 candela it [...]

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