why the reflection in ionosphere isn't direct?,
Please elaborate. Reflection of what? Radio waves?
This topic seems more appropriate for physics or astrophysics forums.
A little helpful advice for you Karim. Many of your posts are like this. We can't read your mind and without any more information than you have given we will not be able to help you. Please give a little more information in the future when posting. Incidentally, looking at your post history you appear to have a very broad range of interests. Where are you from?
just a guess NDTM
IF I may interject I think his question is concerned about how the upper atmosphere protects this planets from the sun.
Sorry I mean Radio wave like HF frequency.
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