If you don’t have glasses for the solar eclipse, this homemade box made with cardboard and aluminum foil works just as well.
If you plan to see the solar eclipse on August 12, you will surely have already been researching methods to see it safely. To look directly at the Sun, x-rays, photographic negatives or any of the tricks that were recommended in the past are not useful. We can hurt our eyes a lot. Only approved glasses are valid. However, if you do not have or do not want to buy them, you can always resort to indirect methods, such as pinhole camera. It is an ideal method to use with children, since you can see the solar eclipse without risk And, what’s more, they have a good time making the box. Of course, it is a perfect plan to do as a family. We tell you everything you need to do it. Materials The materials to make the pinhole camera are very simple. First of all, you need a cardboard box. It may be worth an empty cereal container or shoe box. You also need a white piece of paper, a piece of aluminum foil, tape, a pencil, scissors and a thumbtack. How is the pinhole camera made? To make the pinhole camera, first we need to draw one of the shortest sides of the cardboard box on the sheet of paper. For example, the base of the cereal box. We place it on the sheet of paper, draw the outline and then cut it out. We must glue the resulting piece of paper inside, on the bottom of the box. Next, at the opposite end of the box, two square-shaped holes should be made. If we have a cereal box, which has that side open, we would have to glue a piece of cardboard in the middle, so that the two square openings on the sides can be seen. In this NASA publication there is a video that shows how it should look.. Then, cover one of the openings with aluminum foil secured with adhesive tape. Also, make a small hole in the center of the aluminum foil with a thumbtack. With this the pinhole camera would be ready. How to use it to view the solar eclipse? To use the pinhole camera we must position ourselves with our backs to the sun and look through the hole that doesn’t have aluminum foil. The sun’s rays enter through the small hole in the aluminum foil, which acts as if it were the lens of a camera, so that the image behind it is projected on the blank paper that we place at the bottom of the box. It should be noted that, logically, this device only works during partial solar eclipse. When totality is reached and the Moon completely covers the Sun, there is hardly any light that can enter through the hole, so there will be no projections to look at. The good thing is that, only during that totality, you can look at the sun directly, without glasses. Of course, you have to be very clear when the totality begins and when it ends, since with very little light we can damage our retinas. In short, this is a good way to indirectly see the partial solar eclipse without the need for approved glasses. If you are in one of the places within the band of totality, once it begins, you can look at the Sun directly, but be careful not to go too far. Unless you are in a town like Lerín, where The bells will ring to warn when totality begins and endsget away from the slightest ray that appears. Image | POT In Xataka | The trio of eclipses that await Spain on the horizon: an unprecedented and historic chain between 2026 and 2028