CBSE  /  Class 10  /  Science  /  Human Eye and Colourful World

  • 1. 
    Bifocal lens is used in

  • myopia
  • lever
  • Cataract
  • Presbyopia

  • 2. 
    Stars appears to be twinkling because of

  • atmospheric refraction
  • reflection
  • Tyndall effect
  • spectrum
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