Microscopy: Light and Electron Microscopes

Light Microscopes and Their Limitations

  • Light microscopes use light to view specimens and allow for the discovery of structures like the nucleus.
  • These instruments have limited magnification, making it difficult to view internal structures in detail.
  • They also have limited resolution, which results in a blurred image regardless of magnification levels.

Electron Microscopes

  • Scientists invented the electron microscope to explore internal cell structures with higher precision.
  • Key advantages include significantly greater magnification and much higher resolution compared to light microscopes.
  • Electron microscopes provide clear images of internal details, such as the fine structures inside a nucleus.

Magnification Formula

  • Magnification is calculated using the following equation:
    Magnification=size of imagesize of real object\text{Magnification} = \frac{\text{size of image}}{\text{size of real object}}
  • Practical application involves measuring the image size in millimeters (mmmm) using a ruler.