[" The banwidth of optical fiber is "2GHz" and "],[" light of wavelength "1.3 mu m" is used for "],[" transmission of phone - calls.The "],[" maximum number of phone calls that "],[" could be carried by this fiber is "],[2.3times10^(n)" .The value of "n" is."]

Estimate the fastest bit rate capable of being carried by light of wavelength 1.3 mu m . How many phone calls could be carried at this bit rate ? Band width of optical fibre = 2 GHz.

" The maximum number of electrons in "K" atom "(Z=19)" with quantum numbers "n=3,m=+1,s=+(1)/(2)" is "

An optical fibre communication system works on a wavelength of 1.3 mu_(m) . The number of subscribers it can feed if a channel required 20kHz are

If 2=10^(m) and 3=10^(n) , then find the value of 0.15

An optical fiber has index of refraction n=1.40 and diameter d=100 mu m . It is surrounded by air. Light is sent into the fiber along the axis as shown in figure. If smallest outside radius R permitted for a bend in the fiber for no light to escape is given by 50 x ("in" mu m) fill value of x.