Q20.Only 2% of the optical source frequency is the available channel bandwidth for an optical communicating system operating at 1000 nm. If an audio signal requires a bandwidth of 8 kHz, how many channels can be accommodated for transmission (1) 375 × 107 (2) 75 × 107 (3) 375 × 108 (4) 75 × 109
What This Question Tests
This question tests the ability to calculate the total available bandwidth from a given optical source frequency and then determine the number of communication channels that can be accommodated.
Concepts Tested
Formulas Used
c = fλ
Number of channels = (Total available bandwidth) / (Bandwidth per channel)
📚 NCERT Sections This Tests
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📋 Question Details
- Chapter
- Communication Systems
- Topic
- Optical communication bandwidth
- Year
- 2022
- Shift
- 29 Jun Shift 1
- Q Number
- Q20
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 15: Communication Systems
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