NCERT · Class 12 · Physics · Ray Optics and Optical InstrumentsWhat is the relation between focal length ($f$) and radius of curvature ($R$) of a spherical mirror?
Step-by-Step Solution
The focal length of a spherical mirror is half of its radius of curvature, given by the formula $f = R/2$ under paraxial approximation.
Detailed Options Breakdown
Option : $f = R$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Ray Optics and Optical Instruments.
Option 1: $f = R/2$ (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: $f = 2R$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Ray Optics and Optical Instruments.
Option 3: $f = R^2$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Ray Optics and Optical Instruments.
💡 Study Guide: This question tests core syllabus concepts from Ray Optics and Optical Instruments. For formulas, key summaries, and mock exam reference guides, read the full Ray Optics and Optical Instruments Revision Notes.