Question

what
the
and convex leas?
حج عمرة
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Answer 1

Explanation:

Convex Lens is a lens which is thicker in the middle and narrower at the edges . Lens is a transparent medium through which a light gets refracted or changes its path due to difference in the speed of the light in the medium ( difference in the density of the medium)

Convex Lens is known to have a characteristic to converge the light , that is different rays of light moving through this lens would converge or meet at a point behind the mirror . Actual intersection of light takes place and hence it forms a real image , and it can be obtained on a screen . It forms an inverted image . The magnification depends upon the position of the object .

⇒ If the object is placed within the Centre of Curvature , Then the image is magnified (exception is when an object is placed on Centre of Curvature , where the size of any object remains same)

⇒ If the object is placed beyond the Centre of Curvature , then the image is diminished or is smaller in size .

There are two types of Convex Lenses ,

1. Bi - convex :- Both the edges are narrower at the end.
2. Plano - convex :- The left edge ( from our perspective) is like a plane strip of a mirror , or is straight and the right edge is narrower .
3. Concavo - convex :- The left edge is thicker ( like a concave lens) and the right edge has a narrow end .

Answer 2

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$\longrightarrow$ The Convex lenses are used to eyeglasses for correcting farsightedness, where the distance between the eye's lens and retina is too short, as a result of which the focal point lies behind the retina.

『ADDITIONAL INFORMATION』

➳ This lens is thicker at the centre and gets thinner as we move towards the edges.

➳ This lens converges a straight beam of light.

➳ This concave lens will always produce diminished, upright and virtual image of the object in front of it.

➳ This lens can form both real and virtual images depending on where the light is coming from.

➳ This lens are used in eyeglasses for correcting farsightedness, where the distance between the eye's lens and retina is too short, as a result of which the focal point lies behind the retina.

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