div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentjlewis-when-illuminated-by-rays-parallel-to-the-z-axis-its-shadow-is-a-circularhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: · When illuminated by rays parallel to the z-axis its shadow is a circular disk If the rays are parallel to the y-axis its shadow is a square If the rays are parallel to the loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220421025e7fb0ad8fb8b417ba6fba3fhtml5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentjlewis-when-illuminated-by-rays-parallel-to-the-z-axis-its-shadow-is-a-circularhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: · When illuminated by rays parallel to the z-axis its shadow is a circular disk If the rays are parallel to the y-axis its shadow is a square If the rays are parallel to the loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220421025e7fb0ad8fb8b417ba6fba3fhtml5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentjlewis-when-illuminated-by-rays-parallel-to-the-z-axis-its-shadow-is-a-circularhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: · When illuminated by rays parallel to the z-axis its shadow is a circular disk If the rays are parallel to the y-axis its shadow is a square If the rays are parallel to the loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...