Frequency combs are an important modern tool which are used to calibrate atomic clocks and has various other applications.
About Frequency Comb:
It is a special kind of laser light whose spectrum, or set of frequencies, resembles the teeth of a comb.
Frequency combs are simple and compact tools that phase coherently connect the radio frequency domain (say below 100GHz) with the optical domain (say above 200THz).
Characteristics of Frequency Comb:
Instead of containing just one colour (one frequency), it emits a large number of evenly spaced frequencies. The spacing is extremely regular.
Frequency combs are widely-used, high-precision tools for measuring and detecting different frequencies colors — of light.
It has high stability and precision.
Applications of Frequency comb:
It helps scientists compare an unknown light frequency to a stable reference with extraordinary precision.
It is an important modern tool to calibrate atomic clocks and measure shifts in light caused by gravity.
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