Biol 131 Lab Exam 1- 10%

1. What is the purpose of a compound microscope?

-used to measure temperature of liquids

-used to play music

-used to see objects in outer space

-used to see things that are not visable to the naked eye
-light- (contrast to electron) and compound (more than one lens)
- direct obersvation

A compound microscope is specifically designed to magnify and observe tiny objects that are not visible to the naked eye through the use of multiple lenses and direct observation.

Explanation

A compound microscope is specifically designed to magnify and observe tiny objects that are not visible to the naked eye through the use of multiple lenses and direct observation.

About This Quiz

Designed for Biol 131, this lab exam assesses essential laboratory skills in biology, focusing on practical applications and theoretical understanding. It's crucial for students aiming to enhance their... see morelab competencies in biological sciences. see less

2. Name and label all the parts to the microscope

Scanning electron microscope: vacuum chamber, electron gun, magnetic lenses, specimen chamber, fluorescent screen, photomultiplier tube

Binocular compound microscope:arm, base, binocular head, revolving nose piese, stage, at the top two removable eyepiece lenses (oculars- maginify 10x) on the nose piece 4 objectibe lenses (magnify-4x,10x,40x,100x) 100x- oil immersion lens for use in oil rather than air , coarse and fine adjustment knobs (used for focus) Iris diaphragm (controls the diameter of the cone of light passing upward ) Condenser ( focuses the light cone on the subject, slide) Spring Clamp (holds slides in place) Slide controls (move left right up down) verniers?

Monocular dissecting microscope: stand, arm, stage, single eyepiece lens (magnify 20x), 2 objective lenses (magnify 5x, 10x), Coarse adjustment knob, Mirror for illumination

Telescope: tube, eyepiece, objective lens, focal point, tripod stand, filter wheel, declination knob

3. Why do some lenses have retractable ends?

To make the microscope look more advanced.

Aesthetics and design purposes.

For easier storage and portability.

The high power objective lenses are retractable (i.e. 40XR). This means that if they hit a slide, the end of the lens will push in (spring loaded) thereby protecting the lens and the slide

Some lenses have retractable ends to protect the lens and slide from damage if they hit each other, especially high power objective lenses (like 40XR).

Explanation

Some lenses have retractable ends to protect the lens and slide from damage if they hit each other, especially high power objective lenses (like 40XR).

4. What does parfocal mean?

A term used in photography to describe images that are slightly blurry

Means that the object is in focus under a microscope

Refers to a type of fragrance used in perfumes

The ability to see distant objects clearly without the use of a microscope

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