# Question #276c2

##### 1 Answer
Sep 19, 2017

Similarity -

Sky wave ranges from $0$ to about $30 M H z$ and Ground wave from $0$ to $3 M H z$ both cover ELF, SLF, ULF, VLF, LF, MF regions.

Difference -

Ground wave exists in close proximity of the Earth's surface. Sky wave propagates in the sky and it's propagation is dependent on reflections from the Ionosphere layer in the atmosphere.