(でんぱ)

でんぱ
noun
radio waves, electromagnetic waves
1. radio waves, electromagnetic waves
Electromagnetic radiation used for communication, broadcasting, and other technological applications.
電波(でんぱ)(おく)
To send radio waves.
Radio-controlled clocks are accurate.
電波(でんぱ)時計(とけい) = radio-controlled clock
Information is transmitted via radio waves.
An antenna is needed to receive TV radio waves.
Research is progressing on the effects of cell phone radio waves on the human body.
2. signal, reception (informal)
In casual usage, refers to the quality of wireless signal reception.
ここ電波(でんぱ)(わる)
The reception is bad here.
There's no signal in the mountains.
The signal is weak and I can't watch videos.
When you go underground, the signal sometimes doesn't reach.
Since the new base station was built, the signal in this area has improved.

TECHNICAL USE:

EVERYDAY USE:

SLANG (dated): 電波(でんぱ)(けい) was used to describe someone who seems disconnected from reality or has strange ideas (not recommended to use).

SCIENCE: 電波(でんぱ) is part of the electromagnetic spectrum, with frequencies lower than infrared.