1.1 Flashcards
(15 cards)
When were the first light microscopes developed?
Mid-17th century
What is the maximum magnification of the best light microscopes?
Around 2000 times (×2000)
What is a key advantage of light microscopes?
They can magnify live specimens
What beam do light microscopes use to form an image?
A beam of light
What significant development occurred in the 1930s related to microscopy?
The invention of the electron microscope
What beam do electron microscopes use to form an image?
A beam of electrons
What is the maximum magnification of electron microscopes?
Around 2,000,000 times
What type of images do transmission electron microscopes provide?
2D images with very high magnification and resolution
What type of images do scanning electron microscopes provide?
Dramatic 3D images but lower magnifications
What are the requirements for operating electron microscopes?
Special temperature, pressure, and humidity-controlled rooms
How do you calculate the magnification of a light microscope?
Multiply the magnification of the eyepiece lens by the magnification of the objective lens
If the eyepiece lens is x4 and the objective lens is x10, what is the overall magnification?
X40
True or False: School microscopes usually magnify several thousand times.
False
When labeling drawings made using a microscope, what should be clear?
The magnification at which the specimen was viewed
