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kodGreya [7K]
2 years ago
9

A 20-cm-diameter disk emits light uniformly from its surface. 40 cm from this disk, along its axis, is a 16.0-cm-diameter opaque

black disk; the faces of the two disks are parallel. 40 cm beyond the black disk is a white viewing screen. The lighted disk illuminates the screen, but there's a shadow in the center due to the black disk. What is the diameter of the completely dark part of this shadow
Physics
1 answer:
Marianna [84]2 years ago
7 0

Answer:

132

Explanation:

if you round it is correct

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