Gamma rays are not used for communication.
-- We have no safe way to generate them.
-- We have no cheap way to detect them.
-- We have no way to impress information on them (modulate them).
-- They're dangerous.
Otherwise they're ideal for communication.
Shutter speed<span> is </span>generally measured<span> by the scientific symbol “s”. The </span>measurement means<span> that the </span>measurements<span> in "s" is the reciprocal of the number when the denominator is put on the numerator side instead. ... Aperture is </span>measured<span> by f's.</span>
I believe the answer is B spread sheet because i use spread sheets to make my life easier. I organize info in a spread sheet then it is really easy to find.
hope this helps<span />
