(i) Explain whether the light from a powerful lase or from an ordinary incandescent light source would travel fast in vacuum? Assume you ar given two light sources, say, A and B, with thei coherence lengths being 350 nm and 350 m

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(1) Explain whether the light from a powerful laser
or from an ordinary incandescent light source
would travel fast in vacuum? Assume you are
given two light sources, say, A and B, with their
coherence lengths being 350 nm and 350 m ,
respectively. Further, it is said that one of them is a
laser. Identify the laser light source and give
reason for your judgment.
se
d t?
Transcribed Image Text:(1) Explain whether the light from a powerful laser or from an ordinary incandescent light source would travel fast in vacuum? Assume you are given two light sources, say, A and B, with their coherence lengths being 350 nm and 350 m , respectively. Further, it is said that one of them is a laser. Identify the laser light source and give reason for your judgment. se d t?
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