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An object is placed 15cm in front of a plane mirror. If the mirror is...

Physics
JAMB 2016

An object is placed 15cm in front of a plane mirror. If the mirror is moved further 5cm away from the object and the image is

  • A. 80cm
  • B. 40cm
  • C. 50cm
  • D. 70cm
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Correct Answer: Option B
Explanation

An object is placed 15 cm in front of a plane mirror.

Initial Image Position: The image is 15 cm behind the mirror.

Mirror Movement: The mirror is moved 5 cm further away from the object, making the distance to the mirror 20 cm.

New Image Position: The new image is now also 20cm behind the mirror.

Conclusion

The total distance from the object to the image is 20 cm + 20 cm = 40 cm.

There is an explanation video available below.


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Explanation Video

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