define the term centre of curvature
It holds the lense its kinda obvious :)
The working distance is the distance between the cover slip and the bottom of the housing fo the objective lens.
FORWARD-CONTROL VEHICLE - a motor vehicle in which the centre of the steering wheel is in the forward quarter of the vehicle's 'Total Length'
Kyphosis is an exaggerated outward curvature of the spine, which causes hunching of the back. It can occur at any age but is usually prominent in older women.
principal focus is the ray which diverge at a point on the other side of the lensPrincipal Axis lens have two centre of culvature,the line passing through them and joining these centres is called principal axis.
The curvature of a lens refers to the amount of bending in the lens surface. A lens can have a convex curvature (outward bending) or a concave curvature (inward bending), which affects how it refracts light. Curvature is measured by the radius of curvature, which can determine the focal length and strength of the lens.
The radius of curvature of a lens is the distance between the center of the lens and its focal point. It is a measure of the curvature of the lens surface. A smaller radius of curvature indicates a more curved lens, while a larger radius indicates a flatter lens.
The lens power increases as the curvature of the lens surface becomes steeper. A lens with a larger radius of curvature will have a lower power, while a lens with a smaller radius of curvature will have a higher power. This relationship is described by the lensmaker's equation, which relates the power of a lens to the refractive index of the lens material and the radii of curvature of its surfaces.
The center of curvature of a lens is the point located at a distance equal to the radius of curvature from the center of the lens. It is the point where the principal axis intersects the spherical surface of the lens.
The curvature of a convex lens refers to the amount of curvature or bend present on each of its surfaces. It is typically defined by the radius of curvature, which indicates how sharply the lens surface is curved. This curvature plays a significant role in determining the focal length and optical properties of the lens.
The radius of curvature is the distance from the center of a curved surface or lens to a point on the surface, while the center of curvature is the point at the center of the sphere of which the curved surface is a part. In other words, the radius of curvature is the length of the line segment from the center to the surface, while the center of curvature is the actual point.
The curvature of the radius of a lens affects its focal length and optical power. A lens with a shorter radius of curvature will have a shorter focal length and higher optical power, while a lens with a larger radius of curvature will have a longer focal length and lower optical power.
both according to the position of the image in front of the lensif placed in infiniity or beyond the centre of curvature the image will be small if placed between centre of curvatureand pole the image will be bigger in size
When the curvature of a lens is larger, the focal point moves closer to the lens. This means the lens has a shorter focal length and will converge light rays at a point closer to the lens.
the defective curvature on the cornea or lens is called Astigmatism
No, the focal length and radius of curvature of a lens cannot be the same. The radius of curvature is twice the focal length for a lens. This relationship is based on the geometry of the lens and the way light rays converge or diverge when passing through it.
As a convex lens becomes flatter, its focal length increases. This is because a flatter lens causes light to converge less, resulting in a longer focal length. Conversely, a more curved lens brings light to a focus more quickly.