Notes from the JEE Toppers

3 : Optical Instruments

  • Lens Types: Briefly introduce concave and convex lenses.
  • Lens Diagrams: Explain how to draw ray diagrams for different lens scenarios.
  • Lens Formula: State and explain the formula (1/f = 1/v - 1/u).
  • Magnification: Describe how to calculate the magnification produced by lenses.
  • Power of a Lens: Define and provide the formula (P = 1/f).


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