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3.2.2 Refraction of light

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Question 27

Optical fibres are used to transmit digital signals using infrared radiation.

The average refractive index of the fibres is 1.25.

Which row describes a digital signal and gives the speed of infrared radiation in the fibres?

digital signalspeed of infrared radiation in the fibres / m s−1\text{m s}^{-1}m s−1
Aa signal that consists of a continuous range of values2.4 × 108
Ba signal that consists of only two values2.4 × 108
Ca signal that consists of only two values3.8 × 108
Da signal that consists of a continuous range of values3.8 × 108
A

Row A

B

Row B

C

Row C

D

Row D

Markscheme

3.2.2 Refraction of light Questions

  1. IGCSE
  2. /Physics
  3. /3.2.2 Refraction of light

100 exam-style questions on CIE IGCSE Physics 3.2.2 Refraction of light. Each one has a worked solution and a mark scheme showing where the marks go.

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