Question: The primary mirror in the Hubble space telescope has a parabolic cross section, which is shown in Fig. 21.54. What is the focal length (vertex

The primary mirror in the Hubble space telescope has a parabolic cross section, which is shown in Fig. 21.54. What is the focal length (vertex to focus) of the mirror?

The primary mirror in the Hubble space telescope has a parabolic cross

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