History of the Microscope

Before the invention of microscopes, what were some common beliefs about the causes of diseases?

• Tiny invisible creatures

• Demons, witches, or curses

• Unbalanced bodily fluids

• Poor hygiene and sanitation

What is the primary function of a microscope?

• To measure the temperature of small objects

• To make loud sounds from tiny vibrations

• To allow us to see details in objects too small for the naked eye

• To create new types of light

Which scientist is credited with promoting the use of microscopes as important tools for scientific study?

• Antonie van Leeuwenhoek

• Max Knoll

• Robert Hooke

• Ernst Ruska

In his book "Micrographia," what tiny structures did Robert Hooke observe in plants and name "cells"?

• Animalcules

• Fibers

• Small boxes

• Cells

Who was the fabric merchant who designed his own microscopes and discovered "animalcules" in various liquids?

• Robert Hooke

• Antonie van Leeuwenhoek

• Max Knoll

• Ernst Ruska

What type of light do light microscopes use to magnify objects?

• Ultraviolet light

• Infrared light

• Visible light

• X-rays

Which of the following is generally too small to be seen clearly with a standard light microscope?

• Protists

• Bacteria

• Viruses

• Plant cells

What is the main reason why light microscopes cannot clearly show very tiny objects like viruses or atoms?

• The lenses are not strong enough.

• The objects move too quickly.

• The wavelength of visible light is too large compared to the objects.

• The light is absorbed by the objects.

What do electron microscopes use to create images of subjects?

• Photons of visible light

• Sound waves

• Electrons

• X-rays

How much smaller in wavelength are electrons compared to photons of visible light?

• Up to 100 times smaller

• Up to 1,000 times smaller

• Up to 10,000 times smaller

• Up to 100,000 times smaller