Chapter 1.2: Measuring Cells in Microscopy 

that's for sure

Whenever you get questions about cell measurement, if it doesn't state the unit your answer should be in, always convert to micrometres. Yes, you use the magnification formula to calculate actual size.

Yes that's right

Hi Selam, here you go: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EYDLkVtRzrY.html

Yes you can do that, but often, the question requires you to convert to micrometers. If you use millimetres, make sure to state it clearly in your answer.

It's usually about 100 units but this will be clearly stated in the exam. It's not always the same value.

Hi Zainab, always calculate in Micrometres except the question asks you for a different unit

@@biowithdrdemi if the question doesn't ask us any specific unit, does it means we have to give the answer in micrometers? and if we give the answer in millimeters, does it mean our answer is wrong?

@@muhdfarhat740 if there is no specified unit in the question or in the multiple choices given, give your answer in micrometres

@@biowithdrdemi thank you so much all the way from nepal lot of love from nepal ❤️

The image is the picture or drawing given to you. The actual size is either given or you'll be asked to calculate it. Please watch the examples in the video

@@biowithdrdemi thank you so much:))

I'm not sure if you mean decimal places. If yes, that's a possibility. It's important to check if the question asks for the answer in decimal points and also check the number of decimal places required

They'll tell you the length of each division.

Hi Wendy., the stage micrometre is a microscope slide that is given to you. When you view it under the microscope, you will see that it is a ruler, usually with divisions of 0.01mm. It used to calibrate the eyepiece graticule which is a ruler that you see when you look directly into the microscope. The best way to approach this is to first get a microscope that is similar to the one you will be using in the exam (check with your school for this). Look into it and take note of the ruler inside of it. That ruler has no units and is called the eyepiece graticule. It's just a ruler with 100 lines. To get its units, place the stage micrometre under the microscope like you would if you were observing a specimen. You will see the stage micrometre as another ruler. The difference is that the stage micrometre has units in mm. You can then determine how many lines on the eyepiece graticule correspond with 0.01mm of the stage micrometre. This will help you determine the actual length of the stage micrometre. I hope this helps.

Thank you

I've just written my paper1

@@winnet4081 Oh that's unusual timing.I thought the May/June exams ended a while ago. Might I ask which region you are writing in?

It was a mock exam... we were supposed to write them in may june but they were delayed due to Covid... I'm from Zimbabwe

Hello Sahada, 1mm is equal to 1000 um. 1m is 1,000,000 um