Redbelly98 Staff Emeritus Science Advisor Homework Helper Insights Author Messages 12,179 Reaction score 186 Jan 28, 2009 #2 Welcome to PF If this is a homework or classwork question, you'll need to show what you've tried before receiving help. If it's not for a class, it's better to post outside of the homework forums, perhaps here: https://www.physicsforums.com/forumdisplay.php?f=111 Also, it's not clear just what you want to measure ... wavelength, frequency, wave speed, amplitude?
Welcome to PF If this is a homework or classwork question, you'll need to show what you've tried before receiving help. If it's not for a class, it's better to post outside of the homework forums, perhaps here: https://www.physicsforums.com/forumdisplay.php?f=111 Also, it's not clear just what you want to measure ... wavelength, frequency, wave speed, amplitude?