— A concave spherical surface of refractive index 3/2 is immersed in water of refractive index 4/3 if a point object lies in water at a distance of 10 cm from the pole of the reflective surface calculate the position of the image give the radius of curvature of a spherical surface is 18cm
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— Surface texture is one of the hot spots in the field of surface tribology It promotes friction by storing lubricating oil and abrasive particles and in some cases it can also improve hydrodynamic effects Since it has been widely used in mechanical parts tribological characteristics and surface quality cannot be ignored Nowadays there are
— ESSG based grinding method A curve in the plane XOY a quadratic curve for instance rotates around the axis Y to generate a revolving aspheric or spherical surface in the workpiece coordinate system O XYZ as displayed in Fig curve is called the generating line or generatrix of the surface and axis Y is the rotation axis of the surface
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— vibration direction of the emitting surface points to the centre position of the spherical surface and the vibration displacement of the edge is larger than that of the middle Thus it can be approximately seen that spherical waves are produced when air is excited by a concave spherical emitting surface It can be deduced
— Convex Hulls Surface Mapping onto a Sphere Ben Kenwright Figure 1 Iterative approach for dealing with coplanar triangles a Calculate the shape centroid b determine outer surface points using support mapping the normal from the centroid to each point c project surface points onto a unit sphere centroid to surface point
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— Concave spherical mirrors and ray diagrams A spherical mirror is a reflective segment of a sphere with a radius of curvature R It can be convex outside surface of a sphere or concave inside surface First we will consider a concave spherical mirror The mirror has a radius R and the distance from the mirror to the object is p
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— Three dimensional 3D microlens arrays are a group of micro optics structures on curved surfaces that offer unique optical functions such as wide field of view in a compact arrangement This paper reports an improved rapid lapping and molding system for 3D fabrication of spherical microlens arrays on non planar surfaces including concave
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— CBSE Class 10 Science Practical Skills Focal Length of Concave Mirror and Convex Lens BASIC BUILDING CONCEPTS Spherical Mirror A spherical mirror is a part of hollow sphere with one side having silver/mercury coating further coated with paint to protect it from damage According to the position of silvered surface spherical mirrors are
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— The spherical concave bottom of the rod lens was designed based on a basic refraction theory and was fabricated by using the hyper elastic deformation characteristics of polydimethylsiloxane film
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— For concave surfaces however solving 4 5 cannot always give a reasonable value of θ affected by the radius R of the convex and concave spherical surface This implies that the liquid air interface remains spherical and does not become non spherical until the convex and concave spherical interface extends into a flat one with
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— The maximum spreading factor and area on the concave sphere generally first increase slightly and then decrease with the reduction in the diameter ratio owing to the combined action of the gravity and the surface shape As the diameter ratio decreases the maximum spreading arc angle increases and the maximum diameter of the contact line
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— Introduction Hydrogen energy with high energy density [1] and abundant sources [2 3] is considered as one of the most promising fuels and sustainable energy carriers [4 5] for wide applications in the fields of the transportation chemical engineering and metallurgical industry [6 7] Among the methods of hydrogen production water
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— Compared with the virtual quadratic Newton rings phase shifting moir fringes measurement method our proposed method avoids the retrieve process of wavefront difference data between the testing and standard spherical surface it gives advantages in computing time and its accuracy [11] we established a concave spherical surface
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— The corresponding high magnification SEM image exhibits that the PdAg PANs possess a typical spherical nanostructure with a concave and convex surface over the entire external surface figure 1 b The porous spherical structure is verified by TEM images figures 1 c and d This highly open porous structure is assembled by branched
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