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1. A laser puts out ultra-short pulses of infrared light (wavelength = 1 micrometer (10-6 m)...

1. A laser puts out ultra-short pulses of infrared light (wavelength = 1 micrometer (10-6 m) that are 140 fs long (1 fs = femtosecond = 10-15 seconds). The time between neighboring pulses is 12.5 ns (1 ns = nanosecond = 10-9 seconds). In free space, how wide are the pulses? How many wavelengths is this? What is the distance between neighboring pulses?

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