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üƮ
Ģ[Snell's law]
ĵ Ϲ ־  ӵ , 踦 Ÿ Ģ. 17 ״ õ (Willebrord Snell) ؼ ȭ Ģ Ҹ⵵ Ѵ. Ģ ȣ...[ ]
ȿ[ray effect]
÷. پ ȿ  ִ.
[vignetting]
, ȭ ߽ɺ ֺ ̰ ߻(ֺ )ϴ  ϳ. תǪ롣 ִ.
ٰ[foreground]
̴ ġ. ߰濡 ũ Ϸ̳̼ Ʈ ǹѴ. Ÿ ǿ 󼭴 ʰ  . ٰ濡 ֱ ī޶ ն ū Ѵ...[ ]
[beam of light]
ִ ó ̴ . ° (cross) . , ʹ 찡 .

ī޶ ؼ ° ȭ . ...[ ]
ǵ ϱ
10   11  12  13  14  15  16  17  18  19  20   10 
  ִ лƮ ̵ ȭ ô, λ, а , ̼ ΰ, ,  ǻ, ȣ λ, ְ濵ڿ ӿ, ȣ 276,790 ȭ ϰ ֽϴ.