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5.1 Reflection, refraction and lenses (physics only)

5.1 Reflection, refraction and lenses (physics only)

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Question 3

A corrective eyepiece for a telescope uses a diverging lens with a focal length of -12.5 cm.

Calculate the power of this lens in dioptres.

Use the equation:

power of a lens=1focal length in metres \text{power of a lens} = \frac{1}{\text{focal length in metres}} power of a lens=focal length in metres1​
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Markscheme

5.1 Reflection, refraction and lenses (physics only) Questions

  1. GCSE
  2. /Physics
  3. /5.1 Reflection, refraction and lenses (physics only)

24 exam-style questions on Edexcel GCSE Physics 5.1 Reflection, refraction and lenses (physics only). Each one has a worked solution and a mark scheme showing where the marks go.

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