Space roses, Cosmic Reindeer, Arctic space pendants, and more! ASTEROID FLYBY: Approaching from the direction of the sun, mountain-sized asteroid 2015 JO25 will fly past Earth on April 19th approximately 1.8 million km away. NASA says there is no danger of a collision. This unusually bright space rock is about twice as reflective as the Moon.
Broadcast Antennas. Radio and television broadcast stations transmit their signals via RF electromagnetic waves. Broadcast stations transmit at various RF frequencies, depending on the channel, ranging from about 550 kHz for AM radio up to about 800 MHz for some UHF television stations.
Radio Frequency, or RF, is the mode of communication that is used by most radio devices, from deep space communication networks to cell phones. CB radios use RF transceivers.Some TV remote controls use RF. Cordless phones use RF. A standard radio is the most obvious receiver of radio signals.RF is used to send signals to remote control toys. Wireless routers use RF technology.ome TV remote controls use RF. Cordless phones use RF. A standard radio is the most obvious receiver of radio signals. RF is used to send signals to remote control toys. Wireless routers use RF technology.