This chapter is currently out of syllabus
1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

An optical fibre communication system works on a wavelength of 1.3 $$\mu$$m. The number of subscribers it can feed, if a channel requires 20 kHz are

A
$$2.3\times10^{10}$$
B
$$1.15\times10^{10}$$
C
$$1\times10^{5}$$
D
None of these
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0
Out of Syllabus

Ground waves have wavelength

A
less than that of sky waves
B
greater than that of sky waves
C
less than that of space waves
D
equal to that of space waves
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