An object located in front of a flat mirror was moved to it by 4 cm. How did the distance between the object
| June 19, 2021 | education
An object located in front of a flat mirror was moved to it by 4 cm. How did the distance between the object and its image change? 1) increased by 4 cm 2) decreased by 4 cm 3) increased by 8 cm 4) decreased by 8 cm
A flat mirror doubles the distance between the object and its reflection.
As far as the object is away from the mirror, so is the reflection away from it from its “looking-glass” side.
If the object starts to move towards the mirror, then its reflection will move towards it from the “other” side exactly at the same distance.
Consequently, the distance between them will change in a doubled ratio.
Therefore, the distance between the object and its mirror image in the given example will decrease by 8 centimeters – 4 cm * 2 = 8 cm.
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