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The information carrying capacity of laser is enormous due its large _________

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The information carrying capacity of laser is enormous due its large _________

(a) Coherence

(b) Bandwidth

(c) Directionality

(d) Intensity

This question was posed to me in an online interview.

The query is from Introduction and Applications of Laser topic in division Laser of Engineering Physics II

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Best answer
The correct choice is (b) Bandwidth

Best explanation: Laser has a large bandwidth. The rate at which the information can be transmitted is proportional to bandwidth and the bandwidth is proportional to carrier frequency. Because of these properties, Laser is widely used as optical carrier signal.

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