CampusFin

The lines of a diffraction grating have a spacing of 1.2 m. when a beam of monochromatic light is incident normally on the grating, the first order maximum makes an angle of 30 degree with the normal to diffraction grating. The wavelength of the monochromatic light is:

Review the verified answer and explanation for this Engineering College Admission Test (ECAT) past-paper question on CampusFin.

The lines of a diffraction grating have a spacing of 1.2 m. when a beam of monochromatic light is incident normally on the grating, the first order maximum makes an angle of 30 degree with the normal to diffraction grating. The wavelength of the monochromatic light is: Answer: 600 nano meters

Question context

This question is part of 📡 Electronics and Communication Engineering (ECE) within the broader 🛠️ Engineering Essentials subject and appears in the Engineering College Admission Test (ECAT) preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.