Reflection, refraction and lenses

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Question 55
Easy

Calculate the power of a lens with a focal length of 22 cm.

Use the equation:

power=1focal length \text{power} = \frac{1}{\text{focal length}} power=focal length1​

Where power is in dioptres (D) and focal length is in metres (m).

Give your answer to 2 significant figures.

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Reflection, refraction and lenses Questions

  1. GCSE
  2. /Physics
  3. /Reflection, refraction and lenses