Question

What are the values of wavelengths of Argon laser used in LBM?

(a) 120 – 230 nm

(b) 220 – 310 nm

(c) 330 – 530 nm

(d) 760 – 940 nm

This question was posed to me in an interview for internship.

My doubt is from Laser Beam Machining-Introduction in section Thermal Processes of Advanced Machining

Answer 1

Right answer is (c) 330 – 530 nm

The best explanation: The wavelengths of Argon laser used in LBM range from 330 – 530 nm.