#LetsPrepareATC 🏆 Prepare AAI - ATC Exam (2023) with ATC Gurus Mr. Paras Soni & Dr. Abhijit Sen
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Practice Question
Two spherical mirrors, mirror A concave and mirror B convex, are made out of the same spherical ball of glass of radius 20 cm.

Following New Cartesian sign convention, the focal lengths of A and B are ______and ______, respectively.

Select one correct option:

10cm, -10cm Correct 💪 In-correct 🧐
-10cm, 10cm Correct 💪 In-correct 🧐
10cm, 10cm Correct 💪 In-correct 🧐
-10cm, -10cm Correct 💪 In-correct 🧐
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