Arm microscopefunction

N Back to top Numerical Aperture (NA), The maximum angle from which it can accept light. Lenses that accept light from higher angles have greater resolving power, thus NA defines resolving power. The maximum NA of objectives is 1.4, and it is limited by the physics of light and the refractive index of glass.

Arm microscope definitionand uses

F Back to top Focus (coarse), The coarse focus knob is used to bring the specimen into approximate or near focus.   Focus (fine), Use the fine focus knob to sharpen the focus quality of the image after it has been brought into focus with the coarse focus knob.

Body tubemicroscope

The condenser has an iris diaphragm that controls the angle of the beam of light focused onto the specimen. The iris diaphram is an adjustable shutter which allows you to adjust the amount of light passing through the condenser. The angle determines the Numerical Aperture (NA) of the condenser. This diaphragm, generally called the aperture diaphragm, is one of the most important controls on the microscope.   Cover slip, Most objectives are designed for use with a cover slip between the objective and the specimen. The cover slip becomes part of the optical system, and its thickness is critical for optimal perfomance of the objective. The cover slip thickness designation on most objective lenses is 0.17 mm or 170 microns.

S Back to top Stage, The stage is the platform that supports the specimen. It is usually quite large to minimize vibration and it attaches to the microscope stand. The stage has an opening for the illuminating beam of light to pass through.   A spring loaded clip holds the specimen slide in place on the stage. Other types of stage clips are designed for use with petri-dishes, multiwell plates, or other specialized chambers.   Most stages have a rack and pinion mechanism that can move the specimen slide in two perpendicular (X - Y) directions. On many microscopes, stage movement is controlled using two concentric knobs located to the side or below the stage.   Stand, The stand is the basic structure of the microscope to which everything is attached. The stand, also known as the arm, is the part of the microscope that you grab to transport the microscope.

Parfocal, The specimen is focused for all objectives if it is focused for one objective. In other words, once the specimen is focused under one objective it will be in approximate focus under other objectives.

Here's another learning activity you and your boyfriend can try that can also get the "boys" to dance just for you. Touch the upper inner portion of your boyfriend's thigh. His testicles will move in the direction away from where your hand is touching. This response is known as the cremasteric reflex, which is a safety maneuver that the testicles perform to stay out of harm's way. When the threat is over, the testicles will come back to a position with which they feel temperature friendly and safe.

Arm microscope definitionbiology

I Back to top Illuminator, There is an illuminator built into the base of most microscopes. The purpose of the illuminator is to provide even, high intensity light at the place of the field aperture, so that light can travel through the condensor to the specimen.

Microscopeparts and functions

Microscope Anatomy & Function Glossary Back to Quicktime VR Microscope   A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z   A Back to top   B Back to top Base, The base is the foundation on which the microscope stand is built. It is important that the base is relatively large, stable, and massive. When you are setting up a microscope for the first time ensure that the surface on which it is placed is level.     C Back to top Condenser, The condenser under the stage focuses the light on the specimen, adjusts the amount of light on the specimen, and shapes the cone of light entering the objective. One way to think about the condenser is as a light "pump" that concentrates light onto the specimen.   The condenser has an iris diaphragm that controls the angle of the beam of light focused onto the specimen. The iris diaphram is an adjustable shutter which allows you to adjust the amount of light passing through the condenser. The angle determines the Numerical Aperture (NA) of the condenser. This diaphragm, generally called the aperture diaphragm, is one of the most important controls on the microscope.   Cover slip, Most objectives are designed for use with a cover slip between the objective and the specimen. The cover slip becomes part of the optical system, and its thickness is critical for optimal perfomance of the objective. The cover slip thickness designation on most objective lenses is 0.17 mm or 170 microns. D Back to top   E Back to top   F Back to top Focus (coarse), The coarse focus knob is used to bring the specimen into approximate or near focus.   Focus (fine), Use the fine focus knob to sharpen the focus quality of the image after it has been brought into focus with the coarse focus knob.   G Back to top   H Back to top   I Back to top Illuminator, There is an illuminator built into the base of most microscopes. The purpose of the illuminator is to provide even, high intensity light at the place of the field aperture, so that light can travel through the condensor to the specimen.   J Back to top   K Back to top   L Back to top   M Back to top Magnification, The degree to which the image of the specimen is enlarged by the objective. For example, 40 specifies 40 times (40x) the actual size of the specimen. As magnification increases, resolution (NA) must also increase so that more information can be obtained. Magnification without increased resolution yields no additional information and is called "empty magnification."   N Back to top Numerical Aperture (NA), The maximum angle from which it can accept light. Lenses that accept light from higher angles have greater resolving power, thus NA defines resolving power. The maximum NA of objectives is 1.4, and it is limited by the physics of light and the refractive index of glass.   O Back to top Objective Lens, The objective lens is the single most important component of the microscope. Together with the condenser, it determines the resolution that the microscope's capability. Learning how to use the correct objective for a particular application is a prerequisite for good microscopy.   Important information describing the objective lens is engraved on the side of its barrel. This is the best performance the objective is capable of and it will only yield this performance when used properly. Ocular Lenses, The ocular lenses are the lens closest to the eye and usually have a 10x magnification. Since light microscopes use binocular lenses there is a lens for each eye. It is important to adjust the distance between the microscope oculars, so that it matches your interpupillary distance. This will yield better image quality and reduce eye strain.   P Back to top   Plan, There are many different kinds of objective lenses. Common designations include "plan" for flat field, "achromat" for partially color-corrected, and "apochromat" for highly color corrected. These designations may become combined as in "plan achromat." Parfocal, The specimen is focused for all objectives if it is focused for one objective. In other words, once the specimen is focused under one objective it will be in approximate focus under other objectives. Q Back to top   R Back to top   S Back to top Stage, The stage is the platform that supports the specimen. It is usually quite large to minimize vibration and it attaches to the microscope stand. The stage has an opening for the illuminating beam of light to pass through.   A spring loaded clip holds the specimen slide in place on the stage. Other types of stage clips are designed for use with petri-dishes, multiwell plates, or other specialized chambers.   Most stages have a rack and pinion mechanism that can move the specimen slide in two perpendicular (X - Y) directions. On many microscopes, stage movement is controlled using two concentric knobs located to the side or below the stage.   Stand, The stand is the basic structure of the microscope to which everything is attached. The stand, also known as the arm, is the part of the microscope that you grab to transport the microscope.   T Back to top Tube, the tube houses many of the optical components of the microscope. The optical tube length of most biomedical microscopes is 160 millimeters but tube geometry varies considerably due to relay lenses and proprietary design features. In most modern microscopes the tube is folded to make the microscope easier to use.   Early microscopes had straight tubes such as this model built by Robert Hooke in the mid 17th century. Tube length, describes the optical tube length for which the objective was designed. This is 160 mm (6.3 inches) for modern biomedical microscopes.   Turret, Most microscopes have several objective lenses mounted on a rotating turret to facilitate changing lenses. An audible click identifies the correct position for each lens as it swings into place. When the turret is rotated, it should be grasped by the ring around its edge, and not by the objectives. Using the objectives as handles can de-center and possibly damage them. U Back to top   V Back to top   W Back to top   X Back to top   Y Back to top   Z Back to top   Back to Quicktime VR Microscope

B Back to top Base, The base is the foundation on which the microscope stand is built. It is important that the base is relatively large, stable, and massive. When you are setting up a microscope for the first time ensure that the surface on which it is placed is level.

T Back to top Tube, the tube houses many of the optical components of the microscope. The optical tube length of most biomedical microscopes is 160 millimeters but tube geometry varies considerably due to relay lenses and proprietary design features. In most modern microscopes the tube is folded to make the microscope easier to use.   Early microscopes had straight tubes such as this model built by Robert Hooke in the mid 17th century. Tube length, describes the optical tube length for which the objective was designed. This is 160 mm (6.3 inches) for modern biomedical microscopes.   Turret, Most microscopes have several objective lenses mounted on a rotating turret to facilitate changing lenses. An audible click identifies the correct position for each lens as it swings into place. When the turret is rotated, it should be grasped by the ring around its edge, and not by the objectives. Using the objectives as handles can de-center and possibly damage them.

Alice! Health Promotion. "Why do my boyfriend's balls move on their own?." Go Ask Alice!, Columbia University, 26 May. 2015, https://goaskalice.columbia.edu/answered-questions/why-do-my-boyfriends-balls-move-their-own. Accessed 24, Nov. 2024.

Arm microscope definitionmicrobiology

When the turret is rotated, it should be grasped by the ring around its edge, and not by the objectives. Using the objectives as handles can de-center and possibly damage them.

Testicles are temperature sensitive sperm factories. Sperm need to be kept at a certain temperature to be happy and healthy. When the "boys" get cold, they snuggle up and get warm. Feeling stuffy, they can hang lower to get cool. Just before orgasm, the cremaster and the dartos muscle work as a team to bring the testicles into lock and (un)load position.

Go Ask Alice! isn’t an emergency or instant response service. If you’re experiencing an emergency, please call 911 or visit our Resource Hub to view a list of 24-hour support services and hotlines.

Arm microscope definitionand function

M Back to top Magnification, The degree to which the image of the specimen is enlarged by the objective. For example, 40 specifies 40 times (40x) the actual size of the specimen. As magnification increases, resolution (NA) must also increase so that more information can be obtained. Magnification without increased resolution yields no additional information and is called "empty magnification."

Objective lensmicroscopefunction

Kudos to you and your boyfriend for sharing your observations and experience — what an opportunity to learn more about how our bodies work.

The cool, subtle vibration you described and witnessed may have been due to testicular circulation. Veins and arteries allow the blood flow to run through the entire scrotum.

P Back to top   Plan, There are many different kinds of objective lenses. Common designations include "plan" for flat field, "achromat" for partially color-corrected, and "apochromat" for highly color corrected. These designations may become combined as in "plan achromat."

If your boyfriend's testicular movements were even more pronounced, then you can thank his cremaster muscle. It gently bungees the testicles to whatever part of the neighborhood they need to hang comfortably in. Another muscle, the dartos muscle, helps move the testicles up and down inside the scrotum. Together, they enable, as Kramer would say, "the boys," to dance.

Alice! Health Promotion. (2015, May 26). Why do my boyfriend's balls move on their own?. Go Ask Alice!, https://goaskalice.columbia.edu/answered-questions/why-do-my-boyfriends-balls-move-their-own.

O Back to top Objective Lens, The objective lens is the single most important component of the microscope. Together with the condenser, it determines the resolution that the microscope's capability. Learning how to use the correct objective for a particular application is a prerequisite for good microscopy.   Important information describing the objective lens is engraved on the side of its barrel. This is the best performance the objective is capable of and it will only yield this performance when used properly. Ocular Lenses, The ocular lenses are the lens closest to the eye and usually have a 10x magnification. Since light microscopes use binocular lenses there is a lens for each eye. It is important to adjust the distance between the microscope oculars, so that it matches your interpupillary distance. This will yield better image quality and reduce eye strain.

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

C Back to top Condenser, The condenser under the stage focuses the light on the specimen, adjusts the amount of light on the specimen, and shapes the cone of light entering the objective. One way to think about the condenser is as a light "pump" that concentrates light onto the specimen.

I have a weird question. My boyfriend and I were talking and he told me that men's balls move on their own throughout the day. I did not believe him so he showed me. He got undressed and laid back on the bed and told me to lift his penis and watch real close. I did and unbelievably, his balls moved. It's like they vibrated kind of like a heart beat. It was so cool. What makes a man's balls move alone?