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IB Physics HL C.3.3 Refractive Index Question Bank

Practise IB Physics HL C.3.3 by combining n = c/v with refraction, dispersion, fibre waveguides and optical-material data.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Combine refractive index, speed and wavelength data to solve multi-step optical problems.
  • Explain chromatic or waveguide dispersion from index changes and ray paths.
  • Infer material index or light speed from graphs, interfaces and fibre measurements.

C.3.3—Refractive index question 1

[Maximum number: 1]

A beam of coherent monochromatic light from a distant galaxy is used in an optics experiment on Earth.

The air between the slits and the screen is replaced with water. The refractive index of water is 1.33 .

Calculate the wavelength of the light in water.

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