magnification question(biology as level)

This is the question(I have attached 2 pictures)

Calculate the magnification of the image in Fig. 22.1.

I don't understand why the answer is x50 (or between 48-51)

I have done 62mm : 1.7mm =. x36

the only way to get the right answer would be if the image size was around 82 mm ?

(edited 8 months ago)

Screenshot 2023-08-17 at 14.08.54.jpg125.4KB

Screenshot 2023-08-17 at 14.08.31.png84.6KB

Reply 1

bl0bf1sh

Original post by 00vicky00

This is the question :frown:

u can find the image online)

Calculate the magnification of the image in Fig. 22.1.

I don't understand why the answer is x50 (or between 48-51)

I have done 62mm : 1.7mm =. x36

the only way to get the right answer would be if the image size was around 82 mm ?

What is the full question, and all the numbers? ("Calculate the magnification of the image in Fig. 22.1." is a pretty generic question, so I can't find the image online!)

Magnification = image size ÷ actual size

Is the size of your image the same size that would be printed in the actual physical exam question? If you're reading it online or printed to A5 size then your measurements will be different :smile:

Reply 2

00vicky00

Sorry I didn't know how to include images in the comment :confused:

I have printed it to a A4 paper ,so you are probably right .
I have attached a picture of the question and another one for the mark scheme

(edited 8 months ago)

Screenshot 2023-08-17 at 14.08.54.jpg125.4KB

Screenshot 2023-08-17 at 14.08.31.png84.6KB

Reply 3

bl0bf1sh

Original post by 00vicky00

Sorry I didn't know how to include images in the comment :confused:

I have printed it to a A4 paper ,so you are probably right .
I have attached a picture of the question and another one for the mark scheme

Thanks!
Yes, to calculate the magnification you just measure the distance AB on the paper with your ruler (in mm) and divide this by your answer to part i), which it looks like you have done.
When you're doing practice questions involving calculations like these, the main important things are making sure you know and can manipulate/rearrange your formulae, and knowing which numbers go where etc. – it's only a 2-marker: one for the working and one for the actual answer :smile:

Reply 4

BankaiGintoki

Original post by 00vicky00

Dont worry, when my school gave out questions on magnifications, and we went through it in class, the mark scheme answers no one got, as we printed it and scales it differently.