The opera station signals broadcasts at 90.5 mhz and the rock and roll station broadcasts at 107.1 mhz.  which station signal has waves with longer wavelengths?     which station's signal has waves with higher energy?

107.1 mhz has higher energy photons. the photon energy increases directly proportional to frequency. however if the station operating on 90.5 mhz transmitter's power is 1.184 times or higher than that of the station operating on 107.1 mhz transmitter's power, then the 90.5 mhz signal will have higher energy because the additional photons makeup the difference. the total energy in electromagnetic radiation is the product of the energy per photon and the number of photons (i.e. amplitude of the wave) in the radiation.

Sorry i don’t know what to do