Three differences between concave and convex lens
Answers
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CONCAVE LENS:-
1. It is thinner from the middle and thicker from the ends.
2. It always forms a virtual and dimensied image.
3. It is a diverging lens. (IMPORTANT)
CONVEX LENS:-
1. It is thicker from middle and thinner from edges.
2. It can form real as well as virtual image.
3. It is a converging lens.(IMPORTANT)
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THE DIFFERENCES ARE:
>A Convex lens is also called as "Converging Lens" or "Positive Lens".
>A Concave lens is also called as "Diverging Lens" or "Negative Lens".
>A convex lens is thicker at the center than at the edge. It magnifies or makes things look bigger.
>A Concave lens is thinner in the middle and thicker at the edge.
>A convex lens bends light rays toward each other when the light passes through the lens.
>A concave lens spreads out light rays when light passes through the lens. They cannot form an image on a screen.
>A Convex lens is also called as Positive Lens because of the positive focal length.
>A Concave lens is also called as Negative Lens because of the negative focal length.
>Convex Lenses are called as Converging lenses because they cause parallel rays to converge.
>Concave Lenses are called as Diverging lenses because they cause parallel rays to diverge.
>A convex lens can only form virtual image because the parallel rays passing through the lens bend towards one another.
>A concave lens can form both virtual and real image because the parallel rays passing through the lens spread as they leave the lens
>Convex lenses are curved inward.
>Concave lenses are curved outward.
>Convex lenses are used to correct Long-Sightedness or Hypermetropia. >Concave lenses are used to correct Short- sightedness or Myopia.
Examples:
>The examples of the convex lens are the human eye, cameras, microscopes, telescopes, etc.
>The examples o the concave lens are the laser lights, binoculars, flashlights, etc.