Two mirrors have the same diameter. One of them has a focal ratio of f/5 and the other f/10. How do the focal lengths of the two mirrors compare?
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![Two mirrors have the same diameter. One of them has a focal ratio of f/5 and the other f/10.
How do the focal lengths of the two mirrors compare?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4c150129-159f-4dde-90d5-2588e9a84143%2F2cd7322f-7761-48d2-b6c4-ed1d172e058b%2F8phxvm8b_processed.png&w=3840&q=75)
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