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%3afocal(2535x1779.5%3a2545x1769.5)%2fcloudfront-eu-central-1.images.arcpublishing.com%2fipmgroup%2fD7X6GTTAONCKNJ6ENA4CMM42OA.JPG&cdnurl=https%3a%2f%2fth.bing.com%2fth%2fid%2fR.33ff28505bf067ab8d1fe03cba3a568c%3frik%3dP3b6BNmc0LGG%252bg%26pid%3dImgRaw%26r%3d0&exph=512&expw=768&q=Focal+Figure&simid=607991177607791646&FORM=IRPRST&ck=134CFC2C4078B98F0ACFA046F36EE693&selectedIndex=16&itb=0)
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%2fprincipal-focal-point-(two-of-them)-convex-lens-35.5278959.jpg&cdnurl=https%3a%2f%2fth.bing.com%2fth%2fid%2fR.52789593d1d0d910007a3e5e0c436c93%3frik%3dULVn1uMrQ54Eew%26pid%3dImgRaw%26r%3d0&exph=500&expw=750&q=Focal+Figure&simid=608023355496077813&FORM=IRPRST&ck=5B203A19F667E346C36B71FE5A0F65C2&selectedIndex=34&itb=0)
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