## anonymous 5 years ago 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

1. anonymous

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

2. anonymous

Whoops$E = hf$ not E=hc We can observe that there is a direct relationship between frequency and energy.