Welcome to the Fun - Propagation - 01 quiz.
This is a 'fun' quiz meaning it is intended to both refresh your memory and to a limited degree, prepare you for the Ham Tournament Equinox series.
Note that there are 10 questions.
There are two parallel grading schemes as follows.
Difficulty Points Grading
Some answers are worth more than one point to account for difficulty. Some questions may have two or more correct answers (marked as such) with each answer worth either one point, or a different number of points, again, based on difficulty.
Correct / Incorrect Grading
Each answer, whether it be worth one point or more points, is marked as correct or incorrect. The total number of correct answers is marked out of the possible maximum number of correct answers. So if there was only one question in the quiz and that question had two possible correct answers, if you chose only one of them, you would score 1 out of 2.
Callsign and Email
If you are registered (you can register here) your callsign will be displayed on the leaderboard. If you are not registered, your results will appear but without your callsign – unregistered results will appear in the leaderboards with the callsign 'none'.
Entering your email allows you to receive your results.
1.
Which Swiss astronomer developed a method for studying the impact of sunspots on propagation by calculating a sunspot number equal to ten times the number of sunspot groups plus the count of individual spots?
2.
What equals $10^{-22}$ joules per second per square meter per hertz?
3.
A radio wave far enough from its source to appear flat is called a:
4.
The visible aurora is fluorescence that occurs mostly on this layer.
5.
This is the bending of a ray as it moves at an angle from one medium to another when the size of the medium is much larger than the wavelength at the frequency being considered.
6.
Excluding other factors, how do increased sunspot numbers affect HF radio propagation for amateur radio operators?
7.
Conductivity: is this statement true or false?
In a material with a specific electrical conductivity, long waves penetrate more deeply than short waves, necessitating a thicker mass for effective reflection.Deselect Answer
8.
This is the dispersion of an electromagnetic wave in many directions from a medium when the extent of the medium is much less than one wavelength at the frequency being considered.
9.
What is the primary impact of auroral activity on HF radio propagation?
10.
How does polarization affect HF DX transmissions?
