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Old 10-10-2005, 11:15 AM
hcastro500 hcastro500 is offline
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Question effect of sunblock on hot dog

My son and I are trying to recreate an experiment we read about. Basically, two hotdogs are placed under a sun lamp. One of the two is coated with sunblock. After an hour the uncoated hotdog shrivels and the coated one remains the same. We attempted to recreate this result by placing the hotdogs in direct sunlight on a hot sunny day from 9:30am until 12:30pm. We expected a similar result because the hotdogs were exposed to the entire spectrum of the sun's rays, especially UVA and UVB rays. However, the difference between the the two was negligible. We used spf 30 sunblock. Why is there not a more noticable difference? The sun lamp does not emit any UVB rays and very little UVA rays. What could have caused the hotdog in that experiment to shrivel? Should we be using another type of meat product? Please help.

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