Y12 work for Tuesday 26th April

Apologies, there is no lesson Period 6 today because the Y13 practical exam has over-run and I am s
Please can you bring your practical work to me in R2 now
Please can you also do the following in preparation for Thursday's lesson
1. Find write, illustrate and and learn definitions of the following words (in relation to refraction and reflection)
Reflection, refraction, critical angle, magnified, diminished, inverted, upright, real, virtual, normal, incident ray, plane mirror, refractive index, angle of incidence, angle of refraction, angle of reflection, total internal reflection
2. Practice in Physics page 84 questions 8.24, 8.25, 8.26
Bring this to Thursday's lesson in R23
Thanks
Ms H

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.

Work for 12b Monday 18th April Ms H

Dear Year 12
Apologies, I am not in today, work for today's lesson is, in addition to that on the previous blog post, check your answers to the questions I gave out and answer the practical questions, both documents are in the folder linked below
https://drive.google.com/open?id=0B_-6rEo3ljnVNXRObmVWX3V4WG8

Thanks
Ms H

HW for Thursday Ms H

1. Finish work from previous blog post from me in preparation for the assessed practical
2. Check you understand the derivation of the diffraction grating equation (use links below to help)
3. Do the exam questions I gave out in class
4. Do the summary questions below


http://www.cyberphysics.co.uk/topics/light/A_level/difraction.htm

http://www.antonine-education.co.uk/Pages/Physics_2/Waves/WAV_08/diffraction_grating_formula.htm

1.What is monochromatic light?

2.Where in astronomy do we use diffraction gratings?

3.What path difference condition is necessary for constructive interference?

4.What path difference condition is necessary for destructive interference?