UPSC Combined Geo-Scientist, Mains · 2026 · Mains Paper III
Q5(a). Interference filters
Question
Interference filters are used as wavelength selectors. Sketch a typical interference filter and explain how interference filters provide narrow band of radiation.
Model answer
The free solution for 2026 answers the questions picked in its time plan. Question 5 is answered in full in the Book Edition of the 2026 solutions of Geo-Scientist Chemistry Paper III.
Coverswavelength selectorsInterference filters
All parts of Question 5
- 5(a) Interference filters10 marks
- 5(b) Distribution ratio of an organic acid at three pH values10 marks
- 5(c) Volumetric Cu in brass without interference from Zn10 marks