Question

suppose the opera station broadcasts at 90.5MHz and the rock and roll station broadcasts at 107.1MHz. 1.which stations signal has waves with longer waveslength? 2.which stations signal has waves with higher energy

Answer 1

The energy of an EM wave is expressed as\[E = {hc \over \lambda}\] and the wavelenght, \(\lambda\), is expressed as\[\lambda = {c \over f}\]Therefore, \[E = hc\]where \(h\) is Plank's constant, \(c\) is the speed of light, and \(f\) is frequency in Hz

Answer 2

Whoops\[E = hf\] not E=hc

We can observe that there is a direct relationship between frequency and energy.