Microscopy-I

The video tutorial explores optical devices, focusing on magnifying glasses and microscopes. It explains the types of microscopes, including light and electron microscopes, and their components. The tutorial also covers the properties of microscopes, such as magnifying and resolving power, and provides a brief history of microscopy, highlighting Anton van Leeuwenhoek's contributions.

What type of lens is used in a magnifying glass?

• Plano-convex lens

• Biconcave lens

• Concave lens

• Convex lens

Which type of microscope uses visible light for illumination?

• Electron microscope

• Compound microscope

• Scanning electron microscope

• Transmission electron microscope

What is the main difference between TEM and SEM?

• TEM is used for dissections, SEM is not

• TEM passes electrons through objects, SEM bounces electrons off surfaces

• TEM forms 3D images, SEM forms 2D images

• TEM uses light, SEM uses electrons

What is the function of the iris diaphragm in a compound microscope?

• To magnify the image

• To regulate the light falling on the object

• To adjust the focus

• To hold the slide in place

How is the total magnification of a microscope calculated?

• By subtracting the magnifications of the lenses

• By dividing the magnifications of the lenses

• By multiplying the magnifications of the lenses

• By adding the magnifications of the lenses

What is resolving power in microscopy?

• The ability to distinguish two points as separate

• The ability to focus an image

• The ability to magnify an image

• The ability to illuminate a specimen

Who is considered the father of microscopy?

• Galileo Galilei

• Robert Hooke

• Isaac Newton

• Anton van Leeuwenhoek