An electron and a baseball move at the same speed. Which has the longer wavelength?

A. the baseball

B. the electron

C. Both have the same wavelength.

Question

An electron and a baseball move at the same speed. Which has the longer wavelength?

A. the baseball	

B. the electron	

C. Both have the same wavelength.

shane_b · Answer

If both are moving at the same speed the electron must have the longer wavelength dues to its lower mass. See De Broglie's wavelength equation which states: $$\large w =\frac{ h}{mv}$$where w = wavelength, h = Plancks constant, m = mass and v=velocity. http://chemwiki.ucdavis.edu/Physical_Chemistry/Quantum_Mechanics/De_Broglie_Wavelength