Summary

• Refraction
• Total internal reflection
• Thin lenses

• Class Quiz
  
  
• Catch up and review

gc6 tb 21.14
A converging lens is used to form a sharp image of a candle. What effect does covering the upper half of the lens with paper have on the image?
  A. upper half of image is blocked
  B. lower half of image is blocked
  C. whole image is there but dim
  D. it has virtually no effect
Answer