Comparing Key Microscopes: Light, SEM, and TEM

The video tutorial explores three types of microscopes: light, scanning electron (SEM), and transmission electron (TEM). It covers their working principles, advantages, and limitations. Light microscopes are user-friendly and affordable but have low resolution and magnification. SEM provides detailed 3D surface images, while TEM offers high-resolution images of internal structures. Both electron microscopes require dead samples and are costly. The video emphasizes understanding resolution, recognizing microscope images, and comparing their features.

What are the three types of microscopes discussed in the video?

• Transmission electron microscope, Digital microscope, Light microscope

• Light microscope, Scanning electron microscope, Transmission electron microscope

• Light microscope, Compound microscope, Digital microscope

• Scanning electron microscope, Digital microscope, Compound microscope

What is the main function of the condenser lens in a light microscope?

• To capture the image

• To change the color of the image

• To focus light onto the specimen

• To magnify the image

Which of the following is NOT an advantage of the light microscope?

• Easy to use

• Shows true color

• High resolution

• Can use live specimens

What is the maximum magnification of a typical school light microscope?

• 1000 times

• 200 times

• 400 times

• 1250 times

What is the primary difference between light microscopes and electron microscopes?

• Light microscopes use light, electron microscopes use electrons

• Light microscopes are more expensive

• Electron microscopes show true color

• Light microscopes have higher resolution

How does a scanning electron microscope (SEM) create an image?

• By absorbing electrons through the specimen

• By reflecting electrons off the surface of the specimen

• By absorbing light through the specimen

• By reflecting light off the specimen

What is a major limitation of the scanning electron microscope (SEM)?

• It produces low-resolution images

• It is very expensive and requires extensive training

• It can only be used with live specimens

• It shows true color images

What is the key difference in how a transmission electron microscope (TEM) works compared to an SEM?

• TEM uses light, SEM uses electrons

• TEM absorbs electrons, SEM reflects electrons

• TEM shows true color, SEM does not

• TEM reflects electrons, SEM absorbs electrons

What is the maximum magnification of a transmission electron microscope (TEM)?

• 1,250 times

• 500,000 times

• 200,000 times

• 400 times

Which type of microscope provides a 3D image of the specimen?

• Transmission electron microscope (TEM)

• Light microscope

• Scanning electron microscope (SEM)

• Compound microscope