The main disadvantage of microwave transmission is that microwave towers can exchange data only if they have a clear line of sight between them with no obstacles such as buildings, hills or trees in the way. Other disadvantages include signal absorption by the atmosphere, weather interference and expense.Know More
Microwave signals usually travel in a straight line from a transmitter to a receiver. If the signals pass through regions of air with different densities, as they might when crossing a body of water, the signals bend slightly. Instead of reaching the receiver, some signals are absorbed into the atmosphere, and the lost signals affect transmission quality. Microwave signals can also be affected by heavy rain, hail and snow. Raindrops and hailstones in particular are about the same size as the wavelengths of a high-frequency microwave. A storm can block microwave communication, creating a problem called rain fade. Another disadvantage of microwave transmission is the cost of the towers, which are expensive to build.
An advantage of microwave transmission is that rather than using cables or other physical wires, it uses electromagnetic waves with small wavelengths. The size of the wavelengths allows a transmitter to direct microwaves to a receiver in a narrow beam, improving efficiency. Furthermore, the high frequency of microwaves means that a microwave beam has a very large information-carrying capacity.Learn more about Optics & Waves
To change transmission fluid, jack up the front of the vehicle, open the transmission pan, inspect the old transmission fluid, check the gasket, replace the filter and add new fluid. The exact steps to changing transmission fluid depend on the make and model of the car.Full Answer >
Bluetooth technology allows users to exchange data from fixed and mobile devices. Bluetooth technology includes devices for hands-free phone usage, wireless headsets, speakers and receivers for computers and electronics, sensors for healthcare monitoring and devices for controlling aspects of the home. The technology was invented by the telecom company Ericsson in 1994, and it is developed and managed by the Bluetooth Special Interest Group.Full Answer >
To check the transmission fluid, start the vehicle, park on a level surface, use the parking brake, shift through all gears and then put the vehicle in park, remove the transmission dipstick and clean it completely, return the dipstick and remove it again and then check the level of the fluid in the "COLD" area. To get an accurate reading, the vehicle must be running when checking the transmission fluid.Full Answer >
An echo can be heard in a cave when a sound reflects off surrounding walls and then is heard again. It is also possible to hear an echo in an empty room, in a mountain valley, under a bridge or by calling down into a well.Full Answer >