Determining the Lifetime of a Solar Granule Access and view the video “Granules on the Sun’s Surface” in Chapter 10 of the Discovering the Universe Web site. You will use it to determine the approximate lifetime of a solar granule. Select an area on the Sun’s image and slowly and rhythmically repeat Start, Stop, Start, Stop until you can consistently predict the appearance and disappearance of granules. While keeping your rhythm, move to a different area of the video and continue monitoring the appearance and disappearance of granules. When you are confident that you have the timing right, move your eyes (or use a partner) to the clock shown in the video. Using your Start-Stop cycle, determine the length of time between the appearance and disappearance of the granules and record your answer.
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