How do we know what organelles inside a cell looks like? – asks Anne (7th Grade)

How do we know what organelles inside a cell looks like? Anne, a fascinating questions. I have to be honest I have no idea what an organelle is (I am traditionally what might be called a physical scientist) – I know a lot about physics and chemistry but very little about biology and botany. I do have a team who can set me on the trail of answering you question so here goes…..over to you team.

organlles

Thanks team. Some other questions ‘bounce’ around my mind. Why can’t light bounce of the organelles? I then realised that it is thought that light is in fact particulate  in nature. Scientists think that light might consist of particles – called photons. These photons are basically to big to bounce of such a small particle as an organelle. They could bounce off but when you look at them after the bounce they will not be able tell you anything about the thing they bounced off.

As my team suggest electrons are much smaller than photons, so when they bounce of the organelle they will reflect what the organelle at that point looks like. To do this scientists use special microscopes called electron microscopes  that instead of firing light (photons) at the thing they want to look at fire electrons and look at how the electrons have changed after they have bounced of the thing you are looking at.

Anne, hope this makes sense. Thanks for the question. Unsure about what I have said then you can ask another question.

Leave a Reply

Your email address will not be published.