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Physics 9702 P21

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Can anyone tell me how many marks they will take off if I counted the number of wavelength wrongly (+.5) and carried on using it for the next questions?
The question has 2 marks for the +.5 thing and the next one has 3 marks.
 
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Can anyone tell me how many marks they will take off if I counted the number of wavelength wrongly (+.5) and carried on using it for the next questions?
The question has 2 marks for the +.5 thing and the next one has 3 marks.
What was the number go Wavelengths anyway?
 
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What did you guys write for the alpha, beta & gamma radiation in the first part of question 7?
 
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alpha- helium nucleus
beta- fast moving electron
gamma- electromagnetic radiation
i wrote it in a proper sentence in the paper. :D
I wrote exactly like you but for the gamma: I wrote vibrating electrical and magnetic fields that travel through space without need for a medium. (This is the definition of an electromagnetic wave) Is this correct???
 
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I wrote exactly like you but for the gamma: I wrote vibrating electrical and magnetic fields that travel through space without need for a medium. (This is the definition of an electromagnetic wave) Is this correct???
I have no idea. it must be correct, according to me. but i dont know if it is, according to CIE
 
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