Description A Must For Explorations Of Sound And Waves, These Rods Are An Easy Way To Demonstrate Longitudinal Waves As Opposed To Transverse Waves. They’Re Ideal For Teaching About Nodes And Anti-Nodes In Standing Waves. They Can Be Used For A Memorable Demonstration Of The Physics Of Sound. • Comes With A Teacher’S Guide • Sold In A set Of 2 • Includes A Bag Of Crushed Rosin To Lightly Coat Your Fingertips • Approx. 20″ (500 mm) And 30″ (750 mm) L
