Task id16587
📂 Physics
👤 nerdmavr
Product Description
An electric lamp placed in a matte ball of diameter D1 = 50 cm is suspended at a height h1 = 4.0 m above the floor. At what height is an opaque ball of diameter D2 = 25 cm suspended under a lamp, if only partial shade has formed on the floor? Find the dimensions of this penumbra.
Additional Information
Detailed solution. Format gif
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