Question Video: Comparing the Magnification of Light and Electron Microscopes | Nagwa Question Video: Comparing the Magnification of Light and Electron Microscopes | Nagwa

Question Video: Comparing the Magnification of Light and Electron Microscopes Biology • First Year of Secondary School

Which of the following correctly compares the magnifications and resolutions of electron and light microscopes? [A] Light microscopes have a higher resolution and a higher magnification than electron microscopes. [B] Electron microscopes have a higher resolution but a lower magnification than light microscopes. [C] Electron microscopes have a higher resolution and a higher magnification than light microscopes. [D] Electron microscopes have a lower resolution but a higher magnification than light microscopes.

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Video Transcript

Which of the following correctly compares the magnifications and resolutions of electron and light microscopes? (A) Light microscopes have a higher resolution and a higher magnification than electron microscopes. (B) Electron microscopes have a higher resolution but lower magnification than light microscopes. (C) Electron microscopes have a higher resolution and a higher magnification than light microscopes. (D) Electron microscopes have a lower resolution but a higher magnification than light microscopes.

This question is asking us to review what magnification and resolution are and how these properties compare in electron and light microscopy.

Magnification describes how many times larger the object appears than it actually is. Resolution describes the minimum distance between two objects at which they are both distinguishable. Resolution is related to the wavelength of light used to image a specimen. Shorter wavelengths are capable of resolving greater detail than longer wavelengths. As resolution increases, which uses short wavelengths, objects will appear distinct and not as one.

High magnification often requires high resolution to visualize small objects and distinguish between structures that are close together. If a microscope has high magnification but low resolution, structures that are close together but distinct will appear as unitary constructs. Both light and electron microscopes use the properties of magnification and resolution to help make specimens visible through the eyepiece.

Light microscopes use light and a series of lenses to magnify objects. They can usually magnify objects up to 1500 times before the image loses clarity due to low resolution. Resolution in a light microscope is limited; it’s usually around 200 nanometers for these microscopes.

Electron microscopes use electrons to magnify objects. They can magnify objects up to two million times their actual size. This is possible because electrons can have any wavelength. This leads to greater resolving power in microscopy. So, electron microscopes can resolve distances as low as 0.05 nanometers. This allows for structures that are very close together to be easily distinguished.

So, to review, electron microscopes can resolve objects that are much smaller than those resolvable by light microscopes because of their higher magnification and resolution power. With this information, we can now answer the question. So, the statement that correctly compares the magnification and resolution of electron and light microscopes states that electron microscopes have a higher resolution and a higher magnification than light microscopes.

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