Suppose you are located 180 m from a radio transmitter. (a) How many wavelengths are you from the transmitter if the station calls
itself 1150 AM? (The AM band frequencies are in kilohertz.) (b)
What If? What if this station is 98.1 FM? (The FM band frequencies
are in megahertz.)

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?