(Relaxnews) – Friday, March 20, full alignment of the Earth, moon and sun will produce a rare phenomenon, a solar eclipse, the tenth in a century. A show that is worth to be seen, but not without caution.
Only the North Atlantic, the Faroe Islands and the Norwegian archipelago of Svalbard, will benefit from a complete disappearance of the sun behind the moon. But the partial eclipse will be visible throughout Europe and northern Africa. In France, the occultation of the sun will be up to 80% depending on the area, and will occur between 9 am and 12 pm.
Whether partial or total, the phenomenon represents a real danger to observe with the naked eye. It is therefore essential to be equipped with appropriate spectacles. Without this, the infrared rays of the solar star cause irreversible retinal burns, even at an exhibition a few seconds. These effects can lead to severe visual impairment or blindness.
The false good ideas
In any case, avoid setting the sky with simple sunglasses, very inadequate to protect the eye from sunlight. Optical instruments such as binoculars or camera lenses, are banned too, like sunglasses or DIY home, the type overlay radiological films. Welder’s masks are not necessarily suited to infrared.
The only recommended equipment are special glasses, filtering the light and made of either black polymer or polyester coated with a thin layer of aluminum. The Department of Health said that these accessories “must comply with the provisions of Council Directive 89/686 / EEC relating to personal protective equipment and bear the CE marking of conformity.”
To get them, you can go in pharmacies, opticians or in the astronomy clubs. The magazine “Sky & amp; Space” of the French Association of Astronomy (AFA) distributes in its March issue
.
Finally, it is also advisable to take breaks during observation for not fixing the phenomenon of too many minutes in a row, and rest his eyes.
No comments:
Post a Comment