to discover the existence of something
I could detect the smell of tobacco on his clothes.
electromagnetic
having magnetic and electrical parts
All electronic devices emit electromagnetic radiation.
emit
to release or send something
The kettle emitted steam and a whistling sound when the water was boiled.
fraction
a small part of something
He had done only a fraction of his homework.
frequency
(technical) the number of repetitions of a wave, such as radio or sound, in a unit of time
There are many newscasts on the FM radio frequencies.
infrared
producing a kind of light that cannot be seen, but can be felt
When scientists want to watch an animal doing things at night, they use an infrared camera.
photon
a particle having energy but no mass or electric charge
Plants use light photons to convert it to energy.
property
a particular quality that someone or something has
Due to the chemical property of cesium, it is difficult and dangerous to obtain.
radiation
potentially harmful waves of energy given off by nuclear activity
The radiation leak from the nuclear power plant almost killed the local residents.
vibrate
to move side to side or back and forth very quickly in small movements
My phone vibrated loudly when you called me.
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