Exploring the Microscopic World with Scanning Electron Microscopes

John A, a research engineer at IBM, introduces the scanning electron microscope (SEM) and its advantages over optical microscopes, such as higher resolution. He explains the importance of a stable environment for SEM operation and discusses a past project on silicon geranium that impacted GPS technology. The video includes a demonstration of SEM magnification using a penny, highlighting the detailed imaging capabilities of the SEM.

What is the name of the research engineer presenting the tutorial?

• John B

• John A

• John C

• John D

What type of media does an optical microscope use to reflect off a sample surface?

• Electrons

• Protons

• Light

• Neutrons

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

What is the maximum resolution of an optical microscope?

• 2 microns

• 0.5 microns

• 0.25 microns

• 0.002 microns

Why is the SEM room located on the ground floor?

• To avoid electrical interference

• To minimize acoustic and building vibrations

• To ensure better lighting

• To reduce temperature fluctuations

What compound did IBM research work on that replaced more expensive classical compounds for GPS chips?

• Indium Phosphide

• Gallium Arsenide

• Silicon Carbide

• Silicon Germanium

How long ago did the presenter work on the silicon germanium project?

• 15 years ago

• 12 years ago

• 10 years ago

• 5 years ago

What everyday object is used to demonstrate the magnification capabilities of the SEM?

• A penny

• A piece of fabric

• A leaf

• A coin

Where is Abraham Lincoln's profile found on a penny?

• Only on the front

• Not on the penny

• Only on the back

• On both sides

What environment do electron microscopes operate in?

• In a magnetic field

• In a humid environment

• In a pressurized chamber

• In a vacuum

What is the magnification capability of the SEM mentioned in the video?

• Up to 500,000x

• Up to 1,000,000x

• Up to 100,000x

• Up to 200,000x