Measuring Unknown Strobe Rate ```Name: Reade W. Status: student Age: 17 Location: N/A Country: N/A Date: 6/25/2003 ``` Question: How can I measure the flash rate of a strobe light at its full pulse rate, because the box does not say the exact flash rate per second and that is what i need for my current experiment dealing with projectile motion of a soccer ball, which we will be recording on a video camera while with a strobe light, flashing to break up the motion... so how can i find out my flash rate per second of my strobe light? Replies: You can take an object and drop it along a scale while photographing it under the flash condition. The amount of fall is y = y initial +v initial * time + 0.5 g t^2 Since the first two terms are zero, you measure y off the image, and you know g, you can solve for t. ---Nathan A. Unterman Click here to return to the Physics Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs