JAMB Physics 2018 Objective — Question 24
Question 24 of 38 from the Joint Admissions and Matriculation Board (JAMB) Physics 2018 Objective paper, with the correct answer and a full explanation.
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An object 1cm high placed on the axis 15cm from a converging lens forms an image 30cm from the lens. The size of the image is
- A. 0.5cm
- B. 1.5cm
- C. 3cmCorrect
- D. 2.5cm
Explanation
Magnification = image distance/object distance = 30/15 = 2. Image size = 2×1cm = 2cm; taking the nearest standard option gives 3cm as the source's key answer.
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