Parabolic antenna
Two huge bowl-like objects are placed facing each other on the grass plot outside. These are parabolic antennas of two-meter diameter. Even small voices can be heard clearly at the other end, because the dishes reflect the sound without allowing them to spread. Try to talk in a whisper with your friend.
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Parabolic antenna
You can find TV antennas on top of roofs and on balconies. They are also in bowl-like shapes. This shape directs radio waves received inside the antenna to a single point.
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Microwave
Parabolic antennas receive microwaves with short wavelengths sent from broadcasting satellites. Microwaves are also used for purposes such as meteorological radars and marine radars, as they tend to follow a straight path.
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Microwave ovens
Microwave ovens use microwaves to cause water molecules in food to move and create heat.