Do you know the difference between light and electron microscopes?
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Place the measurement units in order from biggest to smallest
- Picometres (pm)
- Kilometres (km)
- Micrometres (μm)
- Millimetres (mm)
- Nanometres (nm)
- Metres (m)
Which of the following is the equation for total magnification?CorrectIncorrect
What is the resolution of light microscopes limited by?CorrectIncorrect
What is the resolution of electron microscopes limited by?CorrectIncorrect
Drag and drop to match the wavelength to the type of wave/particle
- Visible light
Electrons are both particles and waves, although this is the only time you need to understand that. In every other context, consider electrons to be particles.
What is the field of view of a microscope?CorrectIncorrect
What is the definition of resolution?CorrectIncorrect
Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?CorrectIncorrect
What is the equation for magnification?CorrectIncorrect
There are two equations for magnification, both tell you how many times larger the image appears than it actually is.
One equation links the magnification of the two lenses and the other equation links magnification to the size of the object and image.
Which technology did we develop in the 20th century that allowed us to learn more about sub-cellular structures?CorrectIncorrect
What is the difference in size between micrometres and nanometres?CorrectIncorrect
Convert 3,500,000 nm to m
Convert 59 cm to km
Convert 890 nm to pm
Convert 7.6575 x 10³ into ordinary formCorrectIncorrect
Convert 6.2 × 10⁻⁷ into ordinary formCorrectIncorrect
Convert 8390 into standard form
- x 10
Convert 0.00356 into standard form
- x 10
In an experiment to investigate yeast cells, 2 cells take up 1/5 of the diameter of the field of view of a microscope and the field of view has a diameter of 20μm. Estimate the diameter of 1 cell.
What is the History of Microscopy?
For thousands of years, we knew only a fraction of the complexity of life. We did not understand anything smaller than our own eyes could see. We didn’t know what caused disease and illness, we didn’t know what made up our bodies and most unsettling of all, we didn’t know how much we didn’t even know.
Gradually, contributions from many natural philosophers and inventors built up over time to allow us to see the very small. First came glass, followed by lenses which were initially quite useless! Over time they improved and new ideas from revolutionary thinkers such as Robert Hooke changed the game.
Even the famous Issac Newton made contributions to the physics of understanding how microscopes were to work. Microscopes ultimately became the primary tools for studying the minuscule, from geology to biology.
What can Microscopes do?
In the modern-day, we have access to incredible microscopes and these tools have led to the fascinating fields of microbiology and also made enormous contributions to practical fields such as materials science and engineering. Light microscopes have reached their peak magnification and our newest tool, the electron microscope has opened the next door into the microscopic world.
By using the much smaller wavelengths of electrons in order to illuminate our samples we are able to achieve a vastly higher resolution and magnification, which is required to accurately examine subcellular structures. We have learned that everywhere we look there are new species of bacteria and viruses as well as exotic forms of life such as bacteriophages and the famously resilient tardigrades. There is truly another world out there right under our very eyes.
Did you enjoy the microscopy quiz? Learn more about cells in the quiz on specialisation. If you want to check your knowledge of biology why not check out our GCSE Biology Quiz covering all of GCSE Biology?