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Describe compound microscope with ray diagram?
A compound microscope consists of two lenses: an objective lens and an eyepiece. The objective lens forms a real and inverted image of the object being viewed, which is then magnified by the eyepiece. A ray diagram would show parallel rays of light from the object converging at the focal point of the objective lens, then producing a virtual image that is further magnified by the eyepiece.
How did the Leeuwenhoek microscope work?
Anton van LeeuwenhoekAnton van Leeuwenhoek (1632 to 1723) was a Dutch cloth merchant who made literally hundreds of microscopes. Although compound lenses were invented at that time, they were not yet perfected, and so Leeuwenhoek's microscopes all worked based on a more simple magnification system. Leeuwenhoek's skill as a lens grinder was essential to the success of his microscopes and enabled him to make what were essentially glorified magnifying glasses that could magnify an object up to more than 100 times.The Basic Leeuwenhoek MicroscopeThe standard Leeuwenhoek Microscope is composed of four parts: a small lens to magnify the object, a spike to hold the object in front of the lens (and rotate it if need be), a screw to adjust the position of the object and a large base plate to hold it all together. The object is impaled upon the spike, and the screws are used to rotate the object and move it closer to or farther from the lens.How It WorksThe object is held firmly in place behind the lens, which creates a virtual image of the object that is larger than the actual object. By placing the object closer to the convex lens than the actual focal length of the lens, the object becomes closer than the intended focus, and thus appears larger in the image created in the lens.The skewered object, in the case of the Leeuwenhoek Microscope, is held firmly in place behind the lens closer than the focal point of that convex lens. However, since each individual has a different focal length, an adjustment screw is provided to vary the distance between object and lens to make sure that optimum magnification can be achieved.
How does the lens in your eye change shape when you look at a nearby object then a distant object?
When you look at a nearby object, the ciliary muscles in your eye contract, causing the lens to become thicker and rounder. This helps to increase the refractive power of the lens, allowing you to focus on the nearby object. When you then look at a distant object, the ciliary muscles relax, causing the lens to become thinner and flatter, decreasing its refractive power and allowing you to focus on the distant object.
Which two parts of the light microscope magnify the image of an object?
The objective lens and the eyepiece lens work together to magnify the image of an object in a light microscope. The objective lens collects light from the specimen and forms an initial image, which is then further magnified by the eyepiece lens for viewing.
How the eyes can maintain its focus when the object is farther or closer to the eye?
For near objects, the ciliary muscles will contracts causing the zonular fibers to relax which causes the lens to become rounder which shortens the focal length allowing the objects to be seen up close. For distance objects: the ciliary muscles will relax causing the zonular fibers to tighten which causes the lens to be flatten which lengthen the focal length allowing the objects to be seen at a distance.
How do the shape of the lens change in order to focus on an object?
The shape of the lens changes by becoming thicker or thinner, known as lens accommodation, to focus on objects. When focusing on a near object, the lens becomes thicker, and when focusing on a distant object, the lens becomes thinner. This process allows the lens to adjust its refractive power to bring objects into focus on the retina.
What type of lens is useful for photographing very close to an object?
A macro lens would be the most suitable for photographing very close to an object. This type of lens allows for high magnification and sharp focus on small subjects at close distances.
What can you use a convex lens to do when you hold it close to an object?
When you hold a convex lens close to an object, it can magnify the object by focusing its light rays to form a virtual and enlarged image of the object. This is due to the converging nature of the lens, which causes the light rays to bend and converge at a specific point.
Describe the attitude and approximate size of the image when an object is very close to and far from a convex lens?
When an object is very close to a convex lens, the image appears larger than the object and can be virtual, upright, and magnified. In contrast, when the object is far from the lens, the image is smaller than the object and can be real, inverted, and diminished in size.
The lens you look through magnifies of specimen?
a lens magnifies an object by using the pupal of your eyes and the glass from the lens to look up close. a lens magnifies an object by using the pupal of your eyes and the glass from the lens to look up close.
When viewing an object close to you your lens should be more?
When viewing an object close to you, your lens should be more curved in order to focus the incoming light accurately on your retina at the back of your eye. This change in lens curvature allows you to see nearby objects clearly by adjusting the focal length of the lens.
What happens to the image formed by convex lens if the object is moved closer to the lens?
If the object is moved closer to a convex lens, the image distance will decrease and the image will move closer to the lens. The image size may increase depending on the object distance and object size relative to the focal length of the lens.
What is the attitude and approximate size of an image when an object is close to and far from a concave lens?
When an object is close to a concave lens, the image will appear virtual, upright, and magnified. When the object is far from the concave lens, the image will be real, inverted, and smaller in size.
What happens to the image and magnifications as the object is moved?
As the object is moved closer to a converging lens or mirror, the image distance decreases, and the image becomes larger and more magnified. When the object is moved away from the lens or mirror, the image is formed farther away, becomes smaller, and less magnified.
When viewing an object close to you your lens should be more what?
When viewing an object close to you, your lens should be more curved in order to focus the light rays properly onto your retina. This curvature allows the lens to refract light more effectively and bring nearby objects into sharp focus.
How does the distance between the object and the convex lens affect the characteristic of the image?
The distance between the object and a convex lens affects the size and orientation of the image produced. When the object is moved closer to the lens, the image becomes larger, while moving the object farther away from the lens makes the image smaller. The position of the image also changes, with the image flipping upside down when the object is moved beyond the focal point of the lens.
How does the suspensory ligaments work to focus an image of a close object?
Suspensory ligaments are attached to the lens of the eye and can change the shape of the lens to help focus on close objects. When focusing on a close object, the ciliary muscles contract, which loosens the tension on the suspensory ligaments. This allows the lens to become more rounded, increasing its refractive power to focus the image on the retina.
