Podcast
Questions and Answers
What was the result of Z.Janssen and his son Hans' experiment with lenses in a tube?
What was the result of Z.Janssen and his son Hans' experiment with lenses in a tube?
- Nearby objects appeared greatly enlarged (correct)
- They discovered bacteria
- They observed the circulation of blood corpuscles in capillaries
- They created the first telescope
Who is credited with making a much better instrument with a focusing device?
Who is credited with making a much better instrument with a focusing device?
- Robert Hook
- Charles A.Spencer
- Galileo (correct)
- Anton van Leeuwenhoek
What achievement is attributed to Anton van Leeuwenhoek?
What achievement is attributed to Anton van Leeuwenhoek?
- He was the first to see and describe bacteria, yeast plants, and the circulation of blood corpuscles in capillaries (correct)
- He founded the industry of manufacturing fine optical equipment
- He discovered the principles of lenses
- He created the first telescope
Who reconfirmed Anton van Leeuwenhoek's discoveries of the existence of tiny living organisms in a drop of water?
Who reconfirmed Anton van Leeuwenhoek's discoveries of the existence of tiny living organisms in a drop of water?
When did several European countries begin to manufacture fine optical equipment?
When did several European countries begin to manufacture fine optical equipment?
What is the maximum magnification of present day instruments with blue light?
What is the maximum magnification of present day instruments with blue light?
What is the limitation of a light microscope?
What is the limitation of a light microscope?
What is the purpose of the condenser lens in a microscope?
What is the purpose of the condenser lens in a microscope?
Where is the real image formed in a microscope?
Where is the real image formed in a microscope?
What is the total magnification of a microscope?
What is the total magnification of a microscope?
What is the purpose of the ocular lens in a microscope?
What is the purpose of the ocular lens in a microscope?
Why do scientists need to bypass light altogether to see tiny particles under a microscope?
Why do scientists need to bypass light altogether to see tiny particles under a microscope?
