Teachers: Celebrate PiDay in your classroom! Challenge your students to use pi to solve some of the same problems our scientists and engineers face while exploring other worlds. Answer key is available on March 15. Slice into our NASAPiDayChallenge:
Scientists at JPL study ices found in space to understand what they’re made of and how chemical processes unfold in cold environments. To find out what molecules are produced when sunlight or solar wind hits a comet, scientists place a piece of simulated comet ice in a vacuum to expose it to conditions that exist in space. Then, they aim an infrared laser at the sample to produce a plume that can be analyzed.
Scientists need to know how much energy is hitting the sample in a given area. This is called “fluence.” Enough of it will explode the ice so the sample can be analyzed. Peak fluence is found by dividing the laser’s total optical pulse energy by πwUsing a beam that has a radius of 125.0 µm and a total optical pulse energy of 0.
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