b i What do scientists believe is the origin of CMBR 1 mark 8 b ii Why was the

B i what do scientists believe is the origin of cmbr

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8 (b) (i)What do scientists believe is the origin of CMBR? (18)
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19 G/K83986/Jun12/PH1HP Do not write outside the box (19) There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED
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20 G/K83986/Jun12/PH1HP Do not write outside the box (20) There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Copyright © 2012 AQA and its licensors. All rights reserved. ACKNOWLEDGEMENT OF COPYRIGHT-HOLDERS AND PUBLISHERS Question 1: Wood burning stove photo © Thinkstock Question 4: Double-glazed and single-glazed window photos © Thinkstock Question 5: Diffraction diagram © Steve Witney, My Revision Notes AQA GCSE Physics (for A* to C) 2011, reproduced by permission of Philip Allan Updates
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