WAEC Physics 2025 Theory — Question 2

Model answer

(i) Gas laser: used for surgical procedures/skin treatment, missile guidance, reading barcodes, target designation, and making holograms. (ii) Chemical laser: used for cutting metals, drilling materials, military weapon manufacturing, spectroscopy and military defence. (iii) Dye laser: used for isotope separation, detecting pollutants, studying absorption/emission spectra, and atomic vapour laser isotope separation.