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Ozone absorbs UV radiation. It is present as ozone layer.
ozone
When visible radiation is present, it's possible to accidentally see something that you don't want to see.
The ozone present in stratosphere does this job. It is present as the ozone layer.
We call that ionizing radiation.
yes
always present means that you are always there.
Ultraviolet radiation
Theres always a chance that radiation will not work... as there is with any method.
At present, Australia is said to receive high levels of ultraviolet radiation.
Not al radiation is harmful. There would be no life on earth if the radiation, which we call sunlight, did not exist.
the weak and strong forces
The ash
Ozone absorbs UV radiation. It is present as ozone layer.
The present participle of call is calling.
It is used in smoke detectors as it cannot travel far in air. Alpha radiation is emitted and as long as the detector in the device is receiving the alpha radiation, then no smoke is present. When smoke particles are present, they interrupt the radiation, and so the detector doesn't pick up the radiation, causing the alarm to go off.
None, background radiation is the natural radiation present all around us and has been for thousands of years.