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What is the magnification produced by a concave lens if the object distance is 2

Practice Questions

Q1
What is the magnification produced by a concave lens if the object distance is 20 cm and the image distance is -10 cm?
  1. 0.5
  2. 1
  3. 2
  4. 3

Questions & Step-by-Step Solutions

What is the magnification produced by a concave lens if the object distance is 20 cm and the image distance is -10 cm?
  • Step 1: Identify the object distance (u). In this case, u = 20 cm.
  • Step 2: Identify the image distance (v). Here, v = -10 cm (the negative sign indicates that the image is virtual).
  • Step 3: Use the magnification formula: m = -v/u.
  • Step 4: Substitute the values into the formula: m = -(-10)/20.
  • Step 5: Simplify the equation: m = 10/20.
  • Step 6: Calculate the final result: m = 0.5.
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