a peep hole, such as you'd find in the door of a hotel room, uses a concave lens to make the image of the person standing in the hallway appear smaller than they actually are.
Glasses for nearsighted people.
Two basic kinds of lenses are the concave lens and the convex lens.
Two uses of concave lenses are: 1. Used to make spectacles for people who cannot see short distance objects. 2. Used in peep hole to make the image of the person standing in the hallway appear smaller.
The difference between concave and convex is that convex lenses are the type of lens that make images bigger, while concave make images smaller. Still confused, maybe this will help. When you think of concave think of a cave, how you can see a small image at the end of the cave, while convex is the opposite.
a convex lens is thicker in the center then at the edges. A convex lens acts like a concave mirror, because it focuses rays of light.
The expressions relate to the shape of the surfaces of the lens. Concave means that the surface is like the inside of a sphere, convex means that it looks like the outside surface of a sphere. A lens has two surfaces. Most often the spectacle lens are bent away from the eye: the nearer surface is concave and the outside surface is convex.
Both concave and convex lenses are used in glasses; A microscope, like a reflecting telescope, uses a concave mirror, a plane mirror, and a convex lens; A refracting telescope uses two convex lenses to magnify images in the sky; binoculars use concave lenses to improve detail.
A reflecting telescope is different from a refracting telescope because a reflecting telescope uses a concave lens, a plane mirror, and a convex lens. While a refracting telescope uses two lens.
Convex and concave
Two basic kinds of lenses are the concave lens and the convex lens.
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.
Two uses of concave lenses are: 1. Used to make spectacles for people who cannot see short distance objects. 2. Used in peep hole to make the image of the person standing in the hallway appear smaller.
Maybe its "ocular".
The difference between concave and convex is that convex lenses are the type of lens that make images bigger, while concave make images smaller. Still confused, maybe this will help. When you think of concave think of a cave, how you can see a small image at the end of the cave, while convex is the opposite.
Concave lenses are used in glasses for people who are near-sighted. Convex lenses are used in glasses for people who are far-sighted.
a convex lens is thicker in the center then at the edges. A convex lens acts like a concave mirror, because it focuses rays of light.
a convex lens is thicker in the center then at the edges. A convex lens acts like a concave mirror, because it focuses rays of light.
The expressions relate to the shape of the surfaces of the lens. Concave means that the surface is like the inside of a sphere, convex means that it looks like the outside surface of a sphere. A lens has two surfaces. Most often the spectacle lens are bent away from the eye: the nearer surface is concave and the outside surface is convex.