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2008年11月20日星期四

tips to watch solar eclipse

Solar eclipse watchers need to take some precautions prior to observing the eclipse. This is because the sun’s photosphere emits intense infrared and ultraviolet (UV) radiation. Just as UV radiation causes sunburn to skin, it can also damage the retinas in the eyes at a much faster rate. The human eye can suffer permanent damage if it is exposed to direct sunlight for a few seconds. It is recommended that one wears protective eyewear to safely observe an eclipse.

A safe way to view the sun is to project its image on a screen, such as white paper or cardboard. Projection works well with or without a telescope or binoculars. Other equipment that can be used to observe an eclipse are: eyepiece(s); a solar filter; a solar projection screen; a camera; a camera lens; film; a cable release (including a spare); a video camera; a videotape; spare batteries; a tripod; a tape recorder to record comments and reactions; a shortwave radio to keep track of time; a space blanket; sunscreen and a hat; a stopwatch; a thermometer; a white bed sheet used to catch a glimpse of shadow bands; duct tape; elastic bands; a logbook; and food, water and extra clothing.

Disclaimer: This article provides general information only. Information on this site is not a substitute for professional health care advice.

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