ScienceAges 16-18

Refraction & refractive index of light

Use refractive index n = λ₀ ÷ λ to calculate the reduced wavelength of monochromatic light inside an optical medium. Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 16-18

Refraction & refractive index of light

Take your time. Show your thinking.

1. A monochromatic light beam has wavelength 930 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 930 nm · Medium (n = 1.5): λ = λ₀ ÷ n
2. A monochromatic light beam has wavelength 1180 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 1180 nm · Medium (n = 2): λ = λ₀ ÷ n
3. A monochromatic light beam has wavelength 756 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 756 nm · Medium (n = 1.2): λ = λ₀ ÷ n
4. A monochromatic light beam has wavelength 700 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 700 nm · Medium (n = 2): λ = λ₀ ÷ n
5. A monochromatic light beam has wavelength 405 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 405 nm · Medium (n = 1.5): λ = λ₀ ÷ n
6. A monochromatic light beam has wavelength 672 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 672 nm · Medium (n = 1.2): λ = λ₀ ÷ n
7. A monochromatic light beam has wavelength 312 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 312 nm · Medium (n = 1.2): λ = λ₀ ÷ n
8. A monochromatic light beam has wavelength 432 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 432 nm · Medium (n = 1.8): λ = λ₀ ÷ n
9. A monochromatic light beam has wavelength 644 nm in a vacuum and enters a transparent medium with refractive index n = 1.4. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 644 nm · Medium (n = 1.4): λ = λ₀ ÷ n
10. A monochromatic light beam has wavelength 630 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 630 nm · Medium (n = 1.8): λ = λ₀ ÷ n
11. A monochromatic light beam has wavelength 345 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 345 nm · Medium (n = 1.5): λ = λ₀ ÷ n
12. A monochromatic light beam has wavelength 558 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 558 nm · Medium (n = 1.8): λ = λ₀ ÷ n

12 questions · Seed 46 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Refraction & refractive index of light

Answers and reasoning. Review before teaching.

1. A monochromatic light beam has wavelength 930 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
620 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 930 nm ÷ 1.5 = 620 nm.
2. A monochromatic light beam has wavelength 1180 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
590 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 1180 nm ÷ 2 = 590 nm.
3. A monochromatic light beam has wavelength 756 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
630 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 756 nm ÷ 1.2 = 630 nm.
4. A monochromatic light beam has wavelength 700 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
350 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 700 nm ÷ 2 = 350 nm.
5. A monochromatic light beam has wavelength 405 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
270 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 405 nm ÷ 1.5 = 270 nm.
6. A monochromatic light beam has wavelength 672 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
560 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 672 nm ÷ 1.2 = 560 nm.
7. A monochromatic light beam has wavelength 312 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
260 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 312 nm ÷ 1.2 = 260 nm.
8. A monochromatic light beam has wavelength 432 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
240 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 432 nm ÷ 1.8 = 240 nm.
9. A monochromatic light beam has wavelength 644 nm in a vacuum and enters a transparent medium with refractive index n = 1.4. Calculate its wavelength inside the medium.
460 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 644 nm ÷ 1.4 = 460 nm.
10. A monochromatic light beam has wavelength 630 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
350 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 630 nm ÷ 1.8 = 350 nm.
11. A monochromatic light beam has wavelength 345 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
230 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 345 nm ÷ 1.5 = 230 nm.
12. A monochromatic light beam has wavelength 558 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
310 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 558 nm ÷ 1.8 = 310 nm.

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Refraction & refractive index of light

Take your time. Show your thinking.

1. A monochromatic light beam has wavelength 930 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 930 nm · Medium (n = 1.5): λ = λ₀ ÷ n
2. A monochromatic light beam has wavelength 1180 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 1180 nm · Medium (n = 2): λ = λ₀ ÷ n
3. A monochromatic light beam has wavelength 756 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 756 nm · Medium (n = 1.2): λ = λ₀ ÷ n
4. A monochromatic light beam has wavelength 700 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 700 nm · Medium (n = 2): λ = λ₀ ÷ n
5. A monochromatic light beam has wavelength 405 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 405 nm · Medium (n = 1.5): λ = λ₀ ÷ n
6. A monochromatic light beam has wavelength 672 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 672 nm · Medium (n = 1.2): λ = λ₀ ÷ n
7. A monochromatic light beam has wavelength 312 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 312 nm · Medium (n = 1.2): λ = λ₀ ÷ n
8. A monochromatic light beam has wavelength 432 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 432 nm · Medium (n = 1.8): λ = λ₀ ÷ n
9. A monochromatic light beam has wavelength 644 nm in a vacuum and enters a transparent medium with refractive index n = 1.4. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 644 nm · Medium (n = 1.4): λ = λ₀ ÷ n
10. A monochromatic light beam has wavelength 630 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 630 nm · Medium (n = 1.8): λ = λ₀ ÷ n
11. A monochromatic light beam has wavelength 345 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 345 nm · Medium (n = 1.5): λ = λ₀ ÷ n
12. A monochromatic light beam has wavelength 558 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
Vacuum: λ₀ = 558 nm · Medium (n = 1.8): λ = λ₀ ÷ n

12 questions · Seed 46 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Refraction & refractive index of light

Answers and reasoning. Review before teaching.

1. A monochromatic light beam has wavelength 930 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
620 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 930 nm ÷ 1.5 = 620 nm.
2. A monochromatic light beam has wavelength 1180 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
590 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 1180 nm ÷ 2 = 590 nm.
3. A monochromatic light beam has wavelength 756 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
630 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 756 nm ÷ 1.2 = 630 nm.
4. A monochromatic light beam has wavelength 700 nm in a vacuum and enters a transparent medium with refractive index n = 2. Calculate its wavelength inside the medium.
350 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 700 nm ÷ 2 = 350 nm.
5. A monochromatic light beam has wavelength 405 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
270 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 405 nm ÷ 1.5 = 270 nm.
6. A monochromatic light beam has wavelength 672 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
560 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 672 nm ÷ 1.2 = 560 nm.
7. A monochromatic light beam has wavelength 312 nm in a vacuum and enters a transparent medium with refractive index n = 1.2. Calculate its wavelength inside the medium.
260 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 312 nm ÷ 1.2 = 260 nm.
8. A monochromatic light beam has wavelength 432 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
240 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 432 nm ÷ 1.8 = 240 nm.
9. A monochromatic light beam has wavelength 644 nm in a vacuum and enters a transparent medium with refractive index n = 1.4. Calculate its wavelength inside the medium.
460 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 644 nm ÷ 1.4 = 460 nm.
10. A monochromatic light beam has wavelength 630 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
350 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 630 nm ÷ 1.8 = 350 nm.
11. A monochromatic light beam has wavelength 345 nm in a vacuum and enters a transparent medium with refractive index n = 1.5. Calculate its wavelength inside the medium.
230 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 345 nm ÷ 1.5 = 230 nm.
12. A monochromatic light beam has wavelength 558 nm in a vacuum and enters a transparent medium with refractive index n = 1.8. Calculate its wavelength inside the medium.
310 nm
Inside a medium of refractive index n, wavelength is reduced by a factor of n: λ = 558 nm ÷ 1.8 = 310 nm.

12 questions · Seed 46 · Age guidance, not curriculum certification