Refractive index

Tested in 3 real MPSC questions across 1 year (2021–2021). See it in context on the interactive Concept Graph →

Years it was asked

2021

What you need to know first

Sign convention in opticsRadius of curvatureSnells law basicsDivision of exponents

What mastering this unlocks

Optical FibreTotal Internal ReflectionRefraction of lightApparent depth

Real questions that test this

प्रकाशाचा वेग ____________ असतो. Speed of light is ____________.

1)3×10⁸ मीटर प्रतिसेकंद / 3×10⁸ m/s&check; Correct

2)3×10⁸ सेंटीमीटर प्रतिसेकंद / 3×10⁸ cm/s

3)3×10⁸ किलोमीटर प्रतिसेकंद / 3×10⁸ km/s

4)3×10⁸ इंच प्रतिसेकंद / 3×10⁸ inch/s

The speed of light in a vacuum is a fundamental physical constant, approximately equal to 3 × 10⁸ meters per second.

जर प्रकाश पहिल्या माध्यमातून 2 × 10⁸ ms⁻¹ वेगाने जाताना दुसऱ्या माध्यमात त्याचा वेग 1.25 × 10⁸ ms⁻¹ होत असेल तर दुसऱ्या माध्यमाचा पहिल्या माध्यमाच्या संदर्भातील अपवर्तनांक काढा. Find the refractive index of the second medium with respect to the first medium, if light moves through the first medium with velocity 2 × 10⁸ ms⁻¹, which changes to 1.25 × 10⁸ ms⁻¹ in the second medium.

a)2.5

b)1.33

c)1.6&check; Correct

d)0.625

Refractive index of second medium with respect to first medium is given by the ratio of speed of light in the first medium to that in the second medium: (2 × 10⁸) / (1.25 × 10⁸) = 1.6.

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