In reply to Post # 325:

To better understand this, we have to look at the electromagnetic wave spectrum where 72MHz
band is in the broadcasting region and the 2.4GHz band is in the microwave region.

WHEN FREQUENCY INCREASES, WAVELENGTH DECREASES. Therefore, the 2.4GHz wavelength
is shorter and closer to visible light on the electromagnetic wave spectrum. Since visible light is also
an electromagnetic wave, 2.4GHz wavelength behaves MORE like visible light and travels in straight lines
until it is reflected, deflected, diffracted or absorbed.