Saved Bookmarks
| 1. |
Why do we have better reception of short wave transmission at night than in day? |
| Answer» Solution :Short waves, or, high FREQUENCY waves, getting reflected from the upper and more ionised layer of ionosphere, come BACK to earth surface. During day, these waves are partialy absorbed by the lower and less ionised layers. As a result, TRANSMITTED message through short wave become UNCLEAR. At night, in the absence of sunlight, the lower and less ionised layers are almost absent, so there is almost no absorption of the short waves. For this reason, the clarity of RECEPTION of transmitted message increases greatly. | |