[单选题]
A student constructs an as5 4oljykbd 5ex:c p.+ztronomical telescope with a mw f((v7*z :q c eo9,u j,iit7scloqx:magnification of 10. If the telescope has a converging lens of focal length 50 cm, what is the resulting length ocf,ve 7 omqjt:9 qc *:z,(xl7owii(s uf the telescope?
A. $53 \; cm$
B. $55 \; cm$
C. $60 \; cm$
D. $75 \; cm$
Post time 2024-1-26 22:03:25