BRainliest if correct (if you don't know don't answer.) 2
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To solve this problem we will apply the concepts related to Frequency (Reverse to Period) and the description of the wavelength as a function of the speed of light at the rate of frequency.
Our Laser frequency is given as
Therefore the laser wavelength would be
Where,
c = Speed of light
f = Frequency
The laser pulse is emitted at a period (T) of
Therefore the pulse wavelength would be
Finally the number of wavelengths is the ratio between the two wavelengths, then
The number of wavelengths in the beam length is closer to