Question

The German engineers, Ruska and Knoll are known for their invention of:
1. Microbes
2. Microscope
3. Laser
4. Electron microscope

Answer 1

Correct Answer - Option 4 : Electron microscope

The correct answer is Electron Microscope.

 

• Electron microscope
  • It is a microscope that uses a beam of accelerated electrons as a source of illumination.
  • Electron Microscope has a higher resolving power than that of light microscopes and can reveal the structure of smaller objects.
  • Ernst Ruska along with Max Knoll built the first transmission electron microscope in 1931, for which Ruska was awarded the Nobel Prize in 1936.
  • It is used to investigate the ultrastructure of a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, biopsy samples, metals, and crystals.

• Microbes
  • Microbes are tiny living things that are found all around us and are too small to be seen by the naked eye.
  • They live in water, soil, and in the air.
  • The human body too is home to millions of these microbes, also called microorganisms.
  • The different types of microbes are Bacteria, Fungi, Protista, Viruses, Archaea.
• Microscope
  • The microscope is an instrument that produces enlarged images of small objects, allowing the observer an exceedingly close view of minute structures.
  • The image of an object is magnified through at least one lens in the microscope.
  • This lens bends light toward the eye and makes an object appear larger than it actually is.
  • In 1590, two Dutch spectacle-makers and father-son team, Hans and Zacharias create the first microscope.
• Laser
  • It is a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light typically producing a very narrow beam of radiation.
  • Theodore Maiman made the first laser operation in 1960.
  • Lasers have many uses:
    • ​It is used in precision tools and can cut through diamonds or thick metal.
    • It can also be designed to help in delicate surgeries.
    • It is also used in communications and in carrying TV and internet signals.