Pls help asap!
What is the focal length of a 3-inch f/7 mirror?
A. 0.43 inches
B. 2.3...
Physics, 30.06.2021 22:30 amanda2517
Pls help asap!
What is the focal length of a 3-inch f/7 mirror?
A. 0.43 inches
B. 2.3 inches
C. 21 inches
Answers: 3
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