Q1: Describe the ionosphere layers and discuss their influence on radio wave propagation during both the day and at night.

Q1: Describe the ionosphere layers and discuss their influence on radio wave propagation during both the day and at night.
(250 words)
Q2: Discuss how are the modes of electromagnetic wave propagation between a transmitter and a receiver influenced by the ionosphere layers. Illustrate in a diagram the following dependent variables of the high frequency (HF) path:
· Frequency
· Range of path
· Antenna elevation angle