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Question 1 attached) One scientist used a mirror to signal the other scientist, As shown in the attachment. In the diagram, angle 0( the unknown

Question 1 attached) One scientist used a mirror to signal the other scientist, As shown in the attachment. In the diagram, angle 0( the unknown angle) is:A. 10 degreesB. 40 degreesC. 50 degrees D. 90 degrees

Signalling Mirror 50 Incident ray Reflected

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