its a concave lens(:
They are concave lenses.
The shape of a concave lens is such that the middle part is thinner than the edge. If one side of the lens is flat, then the other side will be shaped inward like a cave, kind of like this: [( You can also have a concave lens where both sides are shaped inward, like this: )( You can even have a concave lens where one side is shaped outward, and the other side is shaped inward, as long as the inward-shaped side is more dramatic than the outward-shaped side.
A lense which bulges outwards is a convex lense.Additionally, a lense which bulges in is called a concave lense. You can remember the difference by thinking about the fact that a cave is like an inward bulge in a cliff, and the inward-bulging lenses are concave.
by pulling it making it thinner in the middle
redi's middle name is mulala
holding your middle finger ang your index finger up at the same time means the middle finger in french!!
Convex lenses are thicker in the middle than at the edges. They refract toward the center. Only people have convex lenses. Concave lenses are used in telescopes and glasses. Concave lenses are thinner in the middle than at the edges. When light passes through concave lenses always bend away from each other toward the edges of the lens.A convex or "positive" lens is thicker in the middle and thinner at the edges. A concave, or "negative" lens is thinner at the middle and thicker at the edges. Convex lenses project a real image behind the lens; concave lenses project a virtual image in front of the lens.
thicker, thinner
Glasses may have convex or concave lenses, depending on the needs of the wearer. A lense for correcting myopia (near-sightedness) is concave, being thinner in the middle than at the edges. A lense correcting hyperopia (farsightedness) is convex, buldging in the middle and becoming thinner toward the edges.
Convex lens are thicker in the middle. Concave lens are thinner in the middle.
Convex bulges outward (thicker in the center than the edge)Concave bulges inward (thinner in the center than the edge)Convex lenses magnify when you look through then, concave lenses make things look smaller.You can focus a distant object to a point with a convex lens (the image will be upside down).
A lens works by delaying light. When light rays encounter a lens, they refract the rays in the direction of the slower area, so a lens that is convex - thinker in the middle and thin on the edges - will bend all the light passing through it to come together. We design the lenses as thicker or thinner to deflect the light in the direction we want it to go.
A convex lens typically fits this description. Convex lenses are thinner in the middle and thicker around the edges, causing light rays passing through them to converge.
because of the lenses it is thicker in the middle thinner on edges
Light refracts when it passes across the boundary of two media having different optical densities (refractive indexes). If the light stated in the question had done this, then it is refracted.
You can't directly compare the two classes of lenses like that.What you can say is:-- The middle of a convex lens is thicker than the edge.-- The middle of a concave lens is thinner than the edge.One way to remember it: The middle of a concave lens is caved in.
Slimmer
concave lens