Optics — Lateral Magnification vs LongitudinalHardQuestion 20245
Question
If a thin lens forms an image with transverse magnification m, the longitudinal (axial) magnification is:
- Am
- Bm²Correct
- C1/m²
- D2m
Correct answer
m²
Explanation
Longitudinal magnification = m_long = −m² (for small axial extent). This means a 3D object has its depth magnified by m² — important for depth of field calculations in photography.