Physics: Optics and Sound: UPSC Previous Year Questions (Science and Technology)
1 previous year UPSC Prelims question on Physics: Optics and Sound (Science and Technology). Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 1–1 of 1 question
UPSC 1996Science and Technology · Physics: Optics and Sound
Q1. Total internal reflection can take place when light travels from:
Explanation
Total internal reflection occurs when light travels from a medium with a higher refractive index to a medium with a lower refractive index, and the angle of incidence exceeds the critical angle. From the given options, total internal reflection can take place when light travels from Diamond to glass. This is because diamond has a higher refractive index than glass, so when light travels from diamond to glass, it can undergo total internal reflection if the angle of incidence is greater than the critical angle.
Answer key for these questions
Q
UPSC year
Correct answer
1
1996
(a) diamond to glass
Frequently asked questions
How many previous year UPSC questions are there on Physics: Optics and Sound?
This page covers 1 previous year UPSC Prelims GS Paper-I questions on Physics: Optics and Sound (Science and Technology), asked from 1996 to 2009. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Physics: Optics and Sound?
Questions on Physics: Optics and Sound (Science and Technology) are available for 8 years, from 1996 to 2009. Use the Year filter to practise a single paper.
