Questions

Author:David Sang

David Sang Physics Solutions for Exercise - Questions

Simple step-by-step solutions to Questions questions of Light from Cambridge IGCSE® Physics Coursebook Second Edition. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Questions with Hints & Solutions

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>Questions>Q 13.19

The refractive index of water is η=1.33. Calculate the critical angle of water.

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>Questions>Q 13.19

Using a protractor, draw an accurate ray diagram to show how a ray of light, striking the internal surface of water at the critical angle, is refracted.

EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>Questions>Q 13.2

The critical angle for a new type of plastic is found to be 40°. What is the refractive index of this material?

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>Questions>Q 13.21

Sketch a diagram to show how a ray of light can trace along a curved glass fibre. Indicate the points where total internal reflection occurs.

HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Physics Coursebook Second Edition>Chapter 13 - Light>Questions>Q 13.22

Why must high-purity glass be used for optical fibres used in telecommunications?