Engineering Metrology Questions and Answers – Wavelength Standard
This set of Engineering Metrology Multiple Choice Questions & Answers (MCQs) focuses on “Wavelength Standard”. 1. Which of the following is not correct about wavelength standard? a) Wavelength of monochromatic light is an invariable unit of length b) Wavelength standard is a physical standard c) It is a reproducible standard d) It is a natural … Read more