OCR Text |
Show Radio Mysteries Every radio listener experiences, the annoyance of fading signals in broadcast reception. A number of theories have been expressed by scientists as to the cause thereof and these learned men have been attempting to remedy this defect. Radio experts of fhe government say that this is because radio waves wav-es are reflected from the Heaviside layer in the atmosphere, body of ionized gaseous material about seventy to two hundred miles above the earth. ' When these reflected re-flected waves return in different time-cycles from the waves arriving arriv-ing direct the fade-outs occur. The usual experience is that radio reception is better in tlu night than in the day and in the winter than in the summer. Thj theory of the scientist explains this by the fact that the Heaviside layer varies in height, daily and seasonally, being higher at night than in the day, and higher In the winter than in the summer The higher it is the better the reception. |