# Asap!!!!spd!!!!sos!!!!! Biology question help!!!!! (magnification)

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#1
https://pmt.physicsandmathstutor.com...%20Biology.pdf

I'm finding the last question (on the last page) confusing. Its very gey.... I got the magnification as x1000. I essentially used the scale bar to work it out. I worked out the image size of the scale bar (10mm according to the markscheme of the previous question). then divided it by the actual size of the scale bar (10um). And got x1000.
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2 years ago
#2
Moved to the Biology forum. You've a better chance of getting a fast response if you post in the subject forum rather than the A-level forum.
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#3
(Original post by Sinnoh)
Moved to the Biology forum. You've a better chance of getting a fast response if you post in the subject forum rather than the A-level forum.
Thanks bae
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2 years ago
#4
You know you measured 10mm and the size was 10um? Did you convert the values to the same scale?
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#5
You know you measured 10mm and the size was 10um? Did you convert the values to the same scale?
YASSSS. Thats why i got x1000 (cuz i did 10000um/10um). The markschemes says some other number. 3.6x10 or something like that :/
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2 years ago
#6
(Original post by shohaib712)
YASSSS. Thats why i got x1000 (cuz i did 10000um/10um). The markschemes says some other number. 3.6x10 or something like that :/
Actually, I misread the question. Where did you get 10mm from? If you looked at Q3 (a), the diameter of the cell was 34mm. This means the actual diameter is 34um. From this, you can calculate the magnification?
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#7
Actually, I misread the question. Where did you get 10mm from? If you looked at Q3 (a), the diameter of the cell was 34mm. This means the actual diameter is 34um. From this, you can calculate the magnification?
Im sooo confused. to work out magnification you do image size divided by actual size. the image size of the cell is 34mm. the actual size of it is 34um. divide both together you still get x1000. You could also do the same with the scale bar. the image size of the scale bar is 10mm and the actual size is 10um. therefore the magnification would also still be x1000
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2 years ago
#8
(Original post by shohaib712)
Im sooo confused. to work out magnification you do image size divided by actual size. the image size of the cell is 34mm. the actual size of it is 34um. divide both together you still get x1000. You could also do the same with the scale bar. the image size of the scale bar is 10mm and the actual size is 10um. therefore the magnification would also still be x1000
It is indeed. Apologies, I initially got confused myself . I think what they intended to do there was divide the two values which gives x1000 because if you look the top value is the image size while the bottom image is the actual size. This isn't written on the mark scheme for some reason. You are correct
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#9
It is indeed. Apologies, I initially got confused myself . I think what they intended to do there was divide the two values which gives x1000 because if you look the top value is the image size while the bottom image is the actual size. This isn't written on the mark scheme for some reason. You are correct
Thank you very much for the help!!!
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