Here is the problem:(adsbygoogle = window.adsbygoogle || []).push({});

The waves froma radio station can reach a home reciever by two paths. One is a straightline path from transmitter to home, a distance of 19900 m. THe second path is by reflection from the ionoshpere.

Assume: this reflection takes place at a point midway between reciever and transmitter. No phase changes on reflection. If the wavelength brodcast by the radio station is 464 m, find the minimum heighthof the ionoshperic layer that produces destructive interference between the direct and the reflected beams.

I cannot figure out how to solve this problem. Where do I start? Could someone please help me?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Destructive interference

**Physics Forums | Science Articles, Homework Help, Discussion**