A student investigates how the qualitative characteristics of images produced by a…
PHYSICS · Multi-part · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A student investigates how the qualitative characteristics of images produced by a single thin convex lens depend on the object’s distance from the lens. The student places an illuminated arrow along the principal axis at three different object distances relative to the lens’s focal length f:
• Position I: so=3f
• Position II: so=2f
• Position III: so=21f
No measurements of image distance or height are to be made; only qualitative reasoning is required.
(1) For each of the three object positions, state whether the image formed is real or virtual and whether it is upright or inverted.
(2) Rank the magnitudes of the image heights hi for the three positions from largest to smallest. If any heights are equal, indicate that explicitly (e.g., hIA=hIB>hIC).
(3) Provide qualitative reasoning for the ranking in part (b) by referring to how the three principal construction rays behave for objects placed at each of the stated distances.