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Discipline: Physics

Question topic: Geometric and Physical Optics: Images from Lenses and Mirrors

Source: Originais Teachy

Level of difficulty: Medium

(Originais Teachy 2023) - Question Medium of Physics

In an art exhibition room, a flat mirror is installed on the wall and moves horizontally towards a painting positioned 2 meters away from the mirror initially. The speed of the mirror relative to the wall is 0.5 m/s. Considering only the horizontal movements and using the laws of reflection, (a) calculate the speed of propagation of the image of the painting relative to the mirror; (b) if the mirror's speed is reversed and it moves away from the painting at the same speed of 0.5 m/s, calculate again the speed of propagation of the image of the painting relative to the mirror; (c) explain the relationship between the speeds found in (a) and (b) and why this occurs.


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