WAEC Physics 2015 Objective — Question 26
Question 26 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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An object is placed 15 cm from a diverging lens of focal length 12 cm. The image of the object formed by the lens is
- A. real and 6.67 cm from the lens
- B. virtual and 6.67 cm from the lensCorrect
- C. real and 60.00 cm from the lens
- D. virtual and 60.00 cm from the lens
Explanation
Using 1/v = 1/u − 1/f with f = −12 cm (diverging) and u = 15 cm gives v ≈ −6.67 cm; the negative sign shows the image is virtual, located 6.67 cm from the lens.
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