Helium-neon lasers are used in engineering laboratories, robot vision systems, and even in the barcode readers on supermarket checkout counters. A certain laser has a power output of 3 mW and produces light of wavelength λ = 632.8 nm. The lowercase Greek character lambda (λ) is a conventional symbol used for wavelength; Appendix A summarizes the names and symbols of other Greek letters.

(a) Convert the power rating to horsepower.

(b) Convert the wavelength to inches.

Solution:

The power dimension $m w$,

The Conversion factors for power and Length are $1 \mathrm{kw}=1.34 \mathrm{hp}$ $1 \mathrm{~m}=39.37$

$ 1 m=39.37 \text {. } \\ $

Solution :-

(a) we first Convert the power's sI prifix, The laser produces $3 \times 10^{-3} \mathrm{w}=3 \times 10^{-6} \mathrm{kw}$.

$ \begin{aligned}\\ P …