Asked by Sab

Please I need some help with this question

A cicular opaque disk, 25cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen.

Answers

Answered by Sab
Can someone please help me- don't know how to get started?
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