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Figure 1 Diffraction of a parallel X-ray beam along the z-axis. The angle between the crystal and the y-axis is . 7+(VW,17(51$7,21$/3+<6,&62/<03,$’ *521,1*(17+(1(7+(5/$1’6 +DQV-RUGHQV ’HSDUWPHQWRI6FLHQFHDQG7HFKQRORJ\8QLYHUVLW\RI*URQLQJHQ7KH1HWKHUODQGV 4XHVWLRQ ;UD\’LIIUDFWLRQIURPDFU\VWDO :HZLVKWRVWXG\;UD\GLIIUDFWLRQE\DFXELFFU\VWDOODWWLFH7RGRWKLVZHVWDUWZLWKWKH GLIIUDFWLRQRIDSODQHPRQRFKURPDWLFZDYHWKDWIDOOVSHUSHQGLFXODUO\RQDGLPHQVLRQDO JULGWKDWFRQVLVWVRI1 [1 VOLWVZLWKVHSDUDWLRQVG DQGG 7KHGLIIUDFWLRQSDWWHUQLV REVHUYHGRQDVFUHHQDWDGLVWDQFH/IURPWKHJULG7KHVFUHHQLVSDUDOOHOWRWKHJULGDQG /LVPXFKODUJHUWKDQG DQGG D ’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

Problem and solution i ph o 21

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Page 1: Problem and solution i ph o 21

Figure 1 Diffraction of a parallel X-ray beam along the z-axis.The angle between the crystal and the y-axis is �.

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Figure 2. The cubic latice ofPotassium Chloride in whichthe K+ and Cl-wons havealmost the same size.

Figure 3. Scattering of X-rays by a powder of KCl crystalsresults in the production of concentric dark circles on aphotographic plate.

Figure 1 The spaceship Atlantis (A) with a satellite(S) in an orbit around the earth. The orbit lies in theearth’s equatorial plane.The magnetic field (B) is perpendicular to thediagram and is directed towards the reader.

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Figure 1 time (days) -->

A sudden change in the shape of the crust of aneutron star results in a sudden change of theangular velocity.

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Figure 2 The experimental setup: a board and thetwo boxes containing the LED and the photo-diode.

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