JAMB - Physics (2016 - No. 7)
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
80cm
40cm
50cm
70cm
Açıklama
An object is placed 15 cm15 \, \text{cm}15cm 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.