Question

In the 1990s the Russian and American navies developed extremely low frequency communications networks to send messages to submerged submarines. The frequency of the carrier wave of the Russian network was 82 Hz, while the Americans used 76 Hz. What was the ratio of the wavelengths of the Russian network to the American network? Be sure to express your answer in decimal form. To calculate the actual underwater wavelength of the transmissions in either network, what additional information would you need? Speed of the American submarine Speed of the Russian submarine Speed of electromagnetic waves in air Speed of electromagnetic waves in seawater

Answer 1

Given thatfrequeny of Russim netsk RB2 H2. Frequen u of American network 0A#76#2 wie know that theequeny and wave leng th ae Ye lated a where requenuy cpeed of electomagnetic rodiahon. λα coave length ラV-A = constant 0.927 The a ddikonal fofomation vequired is c, sine the speed of electromogn ette vodíahon in seo-wate since Sub-marines wok n water 3