Определите оптическую силу (дптр) лупы, дающей пятикратное увеличение.

  1. 150
  2. 15
  3. 25
  4. 20

📝 Detailed explanation

Г = D₀/F → F = D₀/Г = 25/5 = 5 см = 0,05 м.
D = 1/F = 1/0,05 = 20 дптр.
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