WHAT IS LENS

A lens is a transparent refracting medium bounded by  two or at least one spherically curved surface. (what is lens)

What is lens using in various device :In a microscope or in a telescope convex lenses are used to see distant or much closer objects.(what is lens)

What is lens type: Convex and Concave lens. (what is lens)

What is lens definition:

Convex lens:  (what is lens) This lens is thicker in the middle and thinner at the edges; in other words, it is a piece of a transparent medium that bulges out in the middle.(what is lens)

Concave lens: (what is lens) The shape of this lens is just opposite to that of a convex lens. It is thinner in the middle and thicker at the edges; in other words, it is a piece of a transparent medium bent inwards in the middle. (what is lens)

What is lens structure  formed:  (what is lens)A convex lens or concave lens is the combination of frustum of prisms. We know that when a light ray falls on a prism it always bends towards the base of prism. The base of these prisms in a convex lens is towards principal axis of the lens. Similarly in a concave lens base of the frustum of prism is away from the principal axis of the lens. (what is lens)

What is lens activity on light on convex lens:  (what is lens)If any parallel light ray falls on the convex lens, when it strikes on any frustum of the prism it bends towards the base of this prism . (what is lens)Consequently all parallel light ray falling on one or the other such prisms bend towards their bases. (what is lens) Since all bases are facing towards the principal axis the rays also converge towards the principal axis at a point which is known as real focus of the lens. (what is lens)

What is lens another name : (what is lens) For this property this lens is also known as a converging lens. (what is lens)

What is lens activity on light on concave lens:  (what is lens)If any parallel light ray falls on this lens, when it strikes on any frustum of the prism it bends towards the base of this prism. (what is lens) Consequently all parallel light rays falling on one or the other such prisms bend towards their bases.( what is lens) Since all bases are facing away from the principal axis the rays appear to be coming from the point which is known as virtual focus of the lens. (what is lens)

What is lens another name: For this reason this lens is also known as a diverging lens. (what is lens)

What is lens application :i) Eye lens is a convex lens that forms the real and inverted image of any object on the retina.( what is lens)

ii) The lenses used in a camera, microscope and telescope are convex lenses (what is lens)

iii) A magnifying glass is a convex lens used to  watch minute objects. (what is lens)

iv) Spectacles are lenses to correct the vision of our eyes.(what is lens)

v) A concave lens is used in a Gallilean telescope.(what is lens)

What is lens power: Power of a lens is defined in terms of the deviation produced by the lens. (what is lens)

We know, that a lens of smaller focal length deviates the light rays more than a lens of higher focal length. More is  deviation of light higher is the power of the lens. Numerically the power of lens is equal to reciprocal of focal length of the lens in meter. Power (P) = 1/ focal length in meter (what is lens)

The unit of power is dioptre (D) .Convex lens has positive (+) power and concave lens has negative (-) power. When two or more thin lenses are put in contact the power of the combination is equal to algebraic sum of powers of the lenses. If P1, P2, P3………..are the powers of the thin lenses the power of combination of lenses ,P = P1 + P2 + P3 +……… (what is lens)

What is a macro lens :A macro lens is a dedicated camera  lens that is optically optimized to handle extremely  close focusing distances and can take sharp, highly  detailed images of microscopic subjects. Macro lens is mainly used in photography. (what is a macro lens)

what is a macro lens best example:  (what is a macro lens)

  • Macro lens 1 -Canon EF 100mm f/2 .8L Macro IS STM (what is a macro lens)
  • Macro lens 2 -Canon EF-S 35mm f/2.8 Macro IS STM (what is a macro lens)
  • Macro lens 3 -Tamron  SP 90mm f/2.8 Di VC USD Macro. (what is a macro lens)
  • Macro lens 4-Nikon AF-s 105mm f/2.8 G IF ED VR Micro. (what is a macro lens)

What is a macro lens focal length : (what is a macro lens)There are many different  macro lenses on the market today, with focal lengths from 15mm to 200mm. most of the macro lens hit the same 1:1 magnification ratio that gives shooters the life sized reproduction they want for superb close-ups. (what is a macro lens)

What is a macro lens detection: If a lens (what is a macro lens) with a magnification ratio of 1:1 or 2:1 or 3:1 then it is a macro lens.  (what is a macro lens) If the magnification ratio is 1:2, 1:3, 1:4 etc then it is not macro lens. (what is a macro lens)

What is a macro lens advantage:  This macro lens (what is a macro lens) is good for shooting. Macro lens is used for close up. Macro lens is also used in close up photography. (what is a macro lens) A macro lens is a special type of camera lens that has the ability to work with very short focusing distance. (what is a macro lens) Macro lens is useful in taking sharp image of very small object.  What is a Macro lens focusing distance : It is around 30 cm. (what is a macro lens)

What is a macro lens disadvantage: Sometimes macro lens (what is a macro lense) can degrade the quality of the image. (What is a macro lens)

What is a macro lens termed so :Actually macro lens provides a large view of a small object. In other words, (what is a macro lens) macro lens makes the micro image MACRO. (what is a macro lens)

What are toric lenses :A toric lens (what are toric lenses) is a type of lens having different optical power and focal length in two orientations perpendicular to each other. (What are toric lenses) One of the lens surfaces is shaped like a cap from a torus and (what are toric lenses) other one is usually spherical.  (what are toric lenses)Such toric lens behaves like a combination of spherical lens and  (what are toric lenses)cylindrical lens (what are toric lenses).

What are Toric lenses functions :A toric lens (what are toric lenses)  is a contact lens that is shaped in a particular way.  (what are toric lenses) The shape of toric lense creates (what are toric lenses) different refractive , or focusing, powers on the vertical and horizontal orientations.  (what are toric lenses) If the object is moved around the toric lens (what are toric lenses) the refractive strength increases or decreases gradually.(what are toric lenses)

What are toric lenses constituent:  The toric lens  (what are toric lenses) is made of some bio-compatible lens material. Toric IOL  (what are toric lenses) technology uses bio-compatible material (what are toric lenses)  have been successfully used in contact lens. (what are toric lenses)

What are toric lenses problem of  becomeing blurry:  Toric lens (what are toric lenses)  is used in making contact lens.  (what are toric lenses) If it is used for long time (what are toric lenses)  then eyes may become blurred because of much dryness of inside our eye and the weighed lens  can’t swivel to be the right way up again by each blinking (what are toric lenses)

What are toric lenses comfortibility: Toric lens is of  different types   (what are toric lenses) with soft lenses which are the most popular among every one.  (what are toric lenses) Users feel most comfortable using these toric lens because of the hydrogel component,  (what are toric lenses) which provides safety and  comfort. (what are toric lenses)

 What are Toric lense use: Toric lense with different optical power and focal length are primarily used in (what are toric lenses) eye glasses , contact lense and intraocular lenses to correct astigmatism. (what are toric lenses)

(what are toric lenses)Toric IOL reduce lifetime economic costs by reducing the need for glasses or contact lenses following cataract removal. (what are toric lenses)  This results can inform (what ar etoric lenses) physicians and patients regarding the value of toric IOL in the treatment of (what are toric lenses) cataract  and pre-existing astigmatism (what are toric lenses)

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