Physics · Light - Reflection and Refraction
When substituting numerical values for the distances (u, v, f) into the Mirror Formula to solve problems, which prerequisite must be strictly followed?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1All values must be converted to metres
- 2The focal length (f) must always be taken as positive
- 3The New Cartesian Sign Convention must be used✓
- 4All measurements must be taken from the centre of curvature
Correct answer
The New Cartesian Sign Convention must be used
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