Dear Year 12,

Cover work written below. Please bring your completed work next Friday. It is also on Edmodo.

Best wishes,

Mrs Casson

Year 12 Cover Work 22/04/16 CCA

Lesson 1 – Single Slit Diffraction

1.  Watch the video here on single slit diffraction: https://www.youtube.com/watch?v=7CmbItRjM-Y

2.  Draw the pattern for single slit diffraction of monochromatic light. Describe the width of the central maximum compared to the others. How does the width of the central maximum vary with slit separation, slit-screen distance and wavelength (write a formula)?

3.  Research the appearance of white light diffracted from a single slit. Draw what pattern appears. Challenge: Can you explain why this occurs?

Lesson 2 – Optical fibres

1.  List 3 uses of optical fibres

2.  Research and describe the function of the cladding of an optical fibre

3.  Research and draw a diagram explaining modal dispersion in an optical fibre

4.  Research other factors, like pulse broadening and absorption, that can affect the clarity of a signal sent through and optical fibre. Write a description of each.