A girl stands in front of a flat mirror at a distance of 0.5 m from it. What will be the distance between her and her image in the mirror if she moves 1 m further from the mirror?
To find the steady-state distance between the girl and the mirror, we will use the formula: L = -f + d = 2d = 2 * (Ld0 + ΔLd).
The values of the variables: Ld0 – the initial distance between the flat mirror and the girl (Ld0 = 0.5 m); ΔLd is the girl’s displacement (ΔLd = 1 m).
Let’s perform the calculation: L = 2 * (Ld0 + ΔLd) = 2 * (0.5 + 1) = 3 m.
Answer: After displacement, the girl will be at a distance of 3 m from her image.
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