CHAPTER 8

8.1 (a) State Huygens's principle (eg: spherical and plane wave front)

8.1 (b) Sketch and explain the wave front of light after passing through a single slit and obstacle using Huygens's principle

8.2 (a) Define coherence

8.2 (b) State the conditions for interference of light

8.2 (c) State the condition of constructive & destructive interference

8.3 (a) Use Yₘ = mλD/d for bright fringe and Yₘ = (m + 1/2)λD/d for dark fringe

8.3 (b) Use ΔY = λD/d and explain the effect of changing any variable

8.4 (a) Identify the occurrence of phase change upon reflection

8.4 (b) Describe with the aid of a diagram the interference of light in thin films at normal incidence (limit to three media)

8.4 (c & d) Use the equation of constructive & destructive interference for thin film

8.4 (e) Explain the application of thin film (eg: solar panel, glass tint)

8.5 (a) Defined diffraction

8.5 (b) Explain the diffraction of a single slit with the aid of diagram

8.6 (a) Explain the formation of diffraction with the aid of diagram

8.6 (b) Apply d sin θ = nλ where d = 1/N