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Physics, 04.05.2021 17:50 destiniout04231

help FAST !15 pts! What is needed to build a laser?

A. a concave lens and a convex lens that are fully reflective.
B. Two partially reflective mirrors
C. Two fully reflective mirrors
D. A partially reflective mirror and a fully relfective mirror.

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*help FAST* !15 pts! What is needed to build a laser?

A. a concave lens and a convex l...

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