CBSE · Class 10 · Science · Light – Reflection and RefractionIf an object is placed at a distance of 10 cm in front of a convex mirror of focal length 15 cm, the image distance is:
Step-by-Step Solution
Using mirror formula: 1/f = 1/v + 1/u. Here, f = +15 cm, u = -10 cm. 1/15 = 1/v + 1/(-10) => 1/v = 1/15 + 1/10 = (2+3)/30 = 5/30 = 1/6 => v = +6 cm. Therefore, option B is correct.
Detailed Options Breakdown
Option : -6 cm
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Light – Reflection and Refraction.
Option 1: +6 cm (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: -30 cm
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Light – Reflection and Refraction.
Option 3: +30 cm
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Light – Reflection and Refraction.
💡 Study Guide: This question tests core syllabus concepts from Light – Reflection and Refraction. For formulas, key summaries, and mock exam reference guides, read the full Light – Reflection and Refraction Revision Notes.