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In a thin lens, if the object distance is 15 cm and the image distance is 10 cm,

Practice Questions

Q1
In a thin lens, if the object distance is 15 cm and the image distance is 10 cm, what is the magnification?
  1. 0.67
  2. 1.5
  3. 1
  4. 2

Questions & Step-by-Step Solutions

In a thin lens, if the object distance is 15 cm and the image distance is 10 cm, what is the magnification?
Correct Answer: 1.5
  • Step 1: Identify the object distance (u) and the image distance (v). Here, u = 15 cm and v = 10 cm.
  • Step 2: Use the magnification formula, which is m = -v/u.
  • Step 3: Substitute the values into the formula: m = -10/15.
  • Step 4: Simplify the fraction: -10/15 can be reduced to -2/3.
  • Step 5: The absolute value of magnification is |m| = 2/3, which is approximately 0.67.
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