bio topic 2 catch up

Prophase process

Metaphase

Anaphase

Telophase

Cytokinesis

How do we find overall magnification

Multiply both eyepiece magnification and objective magnification

When given a diagram and magnification how do you work out actual length

Work out magnification when given actual size

Compare and contrast light and electron microscopes

Light microscopes

• Use a condensed beam of light focused by convex glass lens and light penetrates the sample

• Pros:

  1. Living organisms can be viewed

  2. Images are in colour

• Cons:

  1. Light has a longer wavelength so lower resolution than electron so cannot see detail inside organelles

  2. 2D image

Transmission electron microscope

• beam of electrons focussed by a beam of electromagnets and electrons are transmitted through the specimen

• Pros: