---
title: "An object is positioned on the principal axis to the left of a thin converging lens of focal length \\(f\\). A student investigates the resulting displacement of the image relative to the lens when the object is shifted a small distance toward the lens for two different initial setups: Case 1, where the object distance satisfies \\(d_o > f\\), and Case 2, where \\(d_o < f\\). Which of the following correctly predicts the direction of motion of the image relative to the lens in each case as the object moves toward the lens?"
description: "## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please […]"
url: "https://nerd-notes.com/ubq/116926/"
date_modified: "2026-08-04T06:10:09+00:00"
---

# An object is positioned on the principal axis to the left of a thin converging lens of focal length \(f\). A student investigates the resulting displacement of the image relative to the lens when the object is shifted a small distance toward the lens for two different initial setups: Case 1, where the object distance satisfies \(d_o > f\), and Case 2, where \(d_o < f\). Which of the following correctly predicts the direction of motion of the image relative to the lens in each case as the object moves toward the lens?

An object is positioned on the principal axis to the left of a thin converging lens of focal length \(f\). A student investigates the resulting displacement of the image relative to the lens when the object is shifted a small distance toward the lens for two different initial setups: Case 1, where the object distance satisfies \(d_o > f\), and Case 2, where \(d_o < f\). Which of the following correctly predicts the direction of motion of the image relative to the lens in each case as the object moves toward the lens?

![A horizontal dashed line represents the principal axis of a thin converging lens. The thin converging lens is positioned vertically at the center as a thin line segment with small outward-pointing arrowheads at both top and bottom ends. Two focal points are marked on the principal axis with small vertical ticks labeled f at equal distances to the left and right of the lens. To the left of the lens, two vertical object arrows point upward from the axis: Object 1 is located at a distance greater than f, and Object 2 is located at a distance less than f. Above each object arrow, a short horizontal arrow points to the right toward the lens. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-diagram-1-1785823809-LbZZtl.jpg)

- **A.** Case 1: Toward the lens | Case 2: Toward the lens
- **B.** Case 1: Toward the lens | Case 2: Away from the lens
- **C.** Case 1: Away from the lens | Case 2: Away from the lens
- **D.** Case 1: Away from the lens | Case 2: Toward the lens

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/116926/*