Physics · Light - Reflection and Refraction
A concave mirror is made from a section of the surface of a sphere of radius 18.0 cm. According to the New Cartesian Sign Convention, if the pole is at the origin and the principal axis lies along the x-axis, its principal focus is located at x = ________.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 19 cm
- 2-9 cm✓
- 3-18 cm
- 418 cm
Correct answer
-9 cm
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