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It's because to change focus, the eye distorts the lens and so the lens has to be flexible. In camera lenses, the lens elements are moved back and forth to focus - it's difficult to see how that kind of mechanism could evolve; but the lens distortion system is similar(ish) to the way muscles work.
What else can I help you with?
What is the appearance and texture of the vitreous humor?
The vitreous humor is a jelly like liquid that fills most of the eye (from the lens back). As we age it changes from a gel to a liquid and gradually shrinks separating from the retina. See related link for more details.
How does a refracting telescope produce an image?
A refracting telescope works just like a magnifying glass. It uses a convex glass lens (to bend light and bring it into focus. This lens is thicker in the center than it is toward its edges, which bends the light more at the edge of the lens than light coming through the center. This allows all of the light to come together at a focus point. The point of focus is where the image is created. If someone looks into the eyepiece, a concave lens magnifies the image Refracting telescopes have two main problems-images are not always clear because the light is being bent and the size of the lens is limited (which limits the power of the telescope).
What are the parts of the that eye that similar to the camera?
In a camera the following parts could be considered equivalent to the parts of a human eye:Optical diaphragm = IrisAperture in optical diaphragm = PupilOuter lens element / lens glass = CorneaInner lens element = Eye lensCCD Sensor (in a digital camera) = RetinaThis is a huge simplification of a very complex topic. Please see the related links for more information.
Why might two lens be used in a telescope?
Because light can enter a lens from either side, a lens has a focal point on both sides. With mirrors, on the other hand, light only enters from one side, so they only have one focal point. the apex answer:The centers of curvature of the two sides of the lens The material the lens is made from
What is a lens element?
A camera lens is actually made up of many smaller lenses; from one to twelve (or more, depending on the application). A lens element is just one of the many others that is inside the camera lens. Lens Barrel: The complete camera lens that houses the many individual lens elements. It also has the mounting hardware located in the rear, which connects to the camera body.
What is the word origin for hand lens?
A hand lens is nothing more than a hand-held magnifying glass. The term "hand lens" is used primarily in a laboratory setting. The lens, or glass, is set into a frame with a handle attached. The fictional Sherlock Holmes popularized the hand lens, or magnifyng glass when looking for clues to solve a mystery.
What is the appearance and texture of the vitreous humor?
The vitreous humor is a jelly like liquid that fills most of the eye (from the lens back). As we age it changes from a gel to a liquid and gradually shrinks separating from the retina. See related link for more details.
What microscope uses two of more glass lenses to magnify living or prepared slides?
A compound microscope uses two or more glass lenses to magnify living or prepared slides. The objective lens closest to the specimen magnifies the image, and the eyepiece lens further magnifies the image for viewing.
Is it possible for a lens to act as a convergent lens in one medium and a divergent lens in another?
Yes. A lens makes use of the property that when light travels from a less dense medium (air) into a more dense medium (glass) it bends toward the surface normal. And when it travels from a more dense medium to a less dense medium it is bent away from the surface normal. So if the lens were placed in a more dense medium then itself the typical direction of light bending would be reversed. You should get a complete reversal of the roles played by a convex lens and a concave lens if you made a cavity inside a glass block in the shape of a lens. A concave glass lens in air does not give a real image but a concave cavity in a glass block should give a real image, in the block.
What are the potential risks associated with using a camera lens with a ground glass focus?
Using a camera lens with a ground glass focus can result in reduced image quality, decreased sharpness, and potential loss of detail in photographs. Additionally, the ground glass may be more prone to scratches and damage compared to other types of lens elements.
What is a jar of jelly?
Its like jam but more jellier
Why is convex lens of small focal-length preferred for magnifying glass?
A convex lens with a small focal length has a greater magnifying power, allowing it to produce a larger and clearer image when used as a magnifying glass. This is because the shorter focal length allows the lens to bend light rays more sharply, resulting in a more pronounced magnification effect.
How is the total magnification of a microscope determined?
Total magnification is determined by multiplying the magnification of the ocular lens by that of the objective lens. Compound microscope that uses more than one lens to direct light through a specimen mounted on a glass slide.
What can you use to make a fake jelly for a prop plastics or the like not plaster of Paris as want it to look clear and jelly like for cheap?
Clear/transparent bathtroom silicon (like caluk) with a tiny amount of oil paint in a jelly mould.Resin with pigment in a silicon jelly mould (More expensive but effective)Actual jelly (like gelatin) but no flavourings just food dye (look for ballistic gel recipie) in a jelly mould
What does An achromatic lens consists of?
An achromatic lens consists of a compound lens made up of two or more elements with different types of glass to minimize chromatic aberration. This design allows the lens to focus multiple wavelengths of light to a single point, resulting in improved image quality.
Uses two or more glass lenses to magnify either living cells or prepared slides?
A compound microscope uses two or more glass lenses to magnify either living cells or prepared slides. The objective lens is positioned close to the specimen to gather light and provide initial magnification, while the eyepiece lens further magnifies the image to the viewer's eye. This dual-lens system allows for higher magnification and resolution compared to a single lens system.
Is jam and jelly the same?
No. Jelly has a TON of sugar in it, jam has more fruit than jelly. You can often find more fruit chunks in jam. Jelly does not have fruit chunks in it.
