Unit 6: Dispersion of light questions and answers

Dispersion of light: sample questions with answers

What unit 6 covers

Questions follow the book: Physics, Secondary, Form Four, Student Book.

1. Lesson 1: Refraction of light through a glass prism

   • Introduction
   • Refraction of light through a glass prism
   • Dispersion of light by glass prism
   • Recombination of spectrum colours to give white light
   • What causes dispersion of white light?
   • Monochromatic light
   • Polychromatic light
   • Rainbow
   • Atmospheric refraction
   • Scattering of light
   • Common phenomena of atmospheric scattering
   • Lesson exercise
   • Chapter exercise

2. Lesson 2: Colours and pigments

   • Colours and pigments
   • Pigment
   • Colour of opaque object in white light
   • Colour of transparent objects in white light
   • Colours of opaque objects in coloured light
   • Using filters of primary colours
   • The colour of transparent objects in coloured light
   • Mixing of colours
   • Pair of complimentary colour
   • Colour mixing as an additive process
   • Mixing pigments
   • Primary pigment
   • Lesson exercise
   • Chapter exercise

3. Lesson 3: Invisible spectrum

   • Invisible spectrum
   • Infrared spectrum
   • Sources of infra-red radiation
   • Properties of infra-red radiations
   • Uses of infra-red rays
   • Ultra violet spectrum
   • Sources of ultra-violet radiation
   • Properties of ultra-violet radiations
   • Uses of ultraviolet radiations
   • Lesson exercise
   • Chapter exercise