Radio waves and microwave frequencies range from..............
Radio waves and microwave frequencies range from..............
The correct option is B 3 kHz to 300 GHz
Radio waves and microwave
frequencies range from 3 kHz to 300 GHz.
Radio frequency (RF) is
any of the electromagnetic wave frequencies that lie in the range extending
from around 3 kHz to 300 GHz, which include those frequencies used for
communications or radar signals. RF usually refers to electrical rather than
mechanical oscillations.
The reason why visible
light can't travel through walls as easily as gamma rays or radio waves is
because, to the visible light, there's something 'there' on a similar scale of
length (wavelength) and time (frequency) that the gamma rays are too small and
fast to interact with and the radio waves are too large and slow.
It has been known for
many years that exposure to very high levels of RF radiation can be harmful due
to the ability of RF energy to heat biological tissue rapidly. This is the
principle by which microwave ovens cook food.
Radio waves and microwave frequencies range from 3 kHz to 300 GHz.
Radio frequency (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around 3 kHz to 300 GHz, which include those frequencies used for communications or radar signals. RF usually refers to electrical rather than mechanical oscillations.
The reason why visible light can't travel through walls as easily as gamma rays or radio waves is because, to the visible light, there's something 'there' on a similar scale of length (wavelength) and time (frequency) that the gamma rays are too small and fast to interact with and the radio waves are too large and slow.
It has been known for many years that exposure to very high levels of RF radiation can be harmful due to the ability of RF energy to heat biological tissue rapidly. This is the principle by which microwave ovens cook food.
