radio one broadcasting

Communication Systems..

Let us now discuss the basic principles of wireless radio communications. We shall mainly concentrate on the principle of amplitude modulation and demodulation. The simplest scheme of wireless communication would be to convert the speech or music to be transmitted to electric signals usin..

Radio Carbon Dating - Radiocarbon The 1 4 C so produced is eventually converted into CO 2 , which in turn is incorporated into plants and trees by the process of photosynthesis and then finds way into animals, which eat pla..

Radiocarbon dating of historical wooden - derived objects is based on the knowledge that the cosmic ray intensity (responsible for 1 4 C production) has been practically constant for thousands of years. 1 4 C is formed in the upper atmosphere by the action of cosmic ..

Choose the relation that best represents the table. Time Weight of a radio active substance Initial 1600 grams After first year 400 grams After second year 100 grams After third year 25 grams => The weight of the radioactive substance decreases by 3 times every year or The weight of the r..

The table shows the weight of a radioactive substance, which decreases by 1 2 every year. Find the weight of the radioactive substance in the 3 rd year. Time Weight of radio active substance Initial 3200 g 1 st year 1600 g 2 nd year 800 g 3 rd year -- 4 th year 200 g =..

This type of wave propagation is said to be unguided. The uniform plane wave exists throughout all space. The electromagnetic energy associated with the wave spreads over a wide area. Wave propagation in unbounded media is used in radio or TV broadcasting where the information ..

The frequency of the radiation emitted is = 980 kHz = 980 x 10 3 Hz = 980 x 10 3 s - 1 c = 3.0 x 10 8 ms - 1 The radio station broadcasts electromagnetic radiation of wavelength = 306m 4. Name the different types of radiations present in the elect..

(the portion of the atmosphere closest to the ground). Frequencies below the HF range travel around the curvature of the Earth, sometimes right around the globe. These ground waves, or surface waves as they are called, are one of the two original means of beyond- the- horizon propagation...

Sky waves are the AM radio waves, which are received after being reflected from the ionosphere. The propagation of radio wave signals from one point to another via reflection from ionosphere is known as sky wave propagation. The sky wave propagation is an important co..