Physics · Ray Optics

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.

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1-10 cm, 10 cm✓
210 cm, -10 cm
310 cm, 10 cm
4-10 cm, -10 cm

Correct answer

-10 cm, 10 cm

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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.

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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.

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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.