As a reminder, none of these options allow you to look directly at the eclipse: you need special eclipse glasses for that.

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(E, F) A cylindrical (or spherocylindrical) lens is used to correct astigmatism, in which parallel rays are not focused uniformly in all meridians. All ...

Sticking with the theme of using items you can easily find around the house, tube viewers can be made using cardboard tubes from household items like paper towels or toilet paper rolls. You can also use thick cardstock rolled up and taped to make your own tube.

While cities brace for traffic, schools brace for absences and space enthusiasts are planning parties, the glasses that enable safe viewing of the eclipse have become something of a hot commodity.

As a certified service center, our team at Joe Cooper Ford of Edmond, OK is more than capable of providing certified transmission service.

Luckily, people who didn't manage to get their hands on glasses are not completely down and out. There are other safe ways to view the eclipse, say experts, and a lot of them only require a little bit of craftiness and items you can find lying around the house.

Kurzbeschreibung. Im Originalinstrument lässt man das Licht eines Sterns durch zwei feine Spalte fallen und bringt sie dann zur Interferenz. Da die Spalte weit ...

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This NASA project uses components you almost certainly already have at home. Using a cereal box, cardboard, foil, paper, scissors and tape or glue, you can put together this projection eclipse viewer.

To make one, you'll need a cardboard tube, white paper, aluminum foil, tape and a pushpin or something else sharp to poke a small hole. According to "Let's Talk Science," you can put this viewer together with these steps:

While the Planetary Society also offers instructions for box or projector viewers that are more "fancy," as they put it, it doesn't get easier than their simple pinhole paper projector.

Another super easy version that requires no crafting? A kitchen colander. An ordinary kitchen colander can easily be used to view a solar eclipse in the same way as other projector viewers; the colander's circular holes project crescent images of the sun onto the ground.

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Peeking directly at the eclipse before it reaches totality without proper eye protection can cause permanent eye damage, experts have warned, making glasses a necessity for safe viewing. But, as the day approaches, they may become harder to find.

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Our typical size range of optical flats and wedges is 50mm to 500mm, but we can accommodate smaller or larger optical flats.

To make the "fancier" version, you'll need 2 index cards (larger, 5-by-7 or A5 cards work better for this) or small paper plates for each person, a pencil, pushpins and a towel, sweatshirt, blanket, flattened corrugated cardboard box, carpet, or other soft substrate to place underneath card during pin pushing.

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To make it, you only need two index cards (3-by-5 or A6 or A7 size) or small paper plates for each person and basic pushpins. Simply use the pushpin to punch a small hole close to the middle of one of the cards and you're done.