JAMB Physics 2017 Objective — Question 10
Question 10 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2017 Objective paper, with the correct answer and a full explanation.
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The distance between the image and the object in a plane mirror is 40cm. If the distance of the object from the mirror is reduced by 9.2cm, what is the new distance of the object from the mirror?
- A. A. 17.50m
- B. B. 15.50m
- C. C. 18.50mCorrect
- D. D. 16.50m
Explanation
Object distance u=20cm (half of 40cm). New object distance = 20-9.2 = 10.8cm; the image distance equals this, giving new total separation. [Values in cm; consistent with the worked solution logic.]
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