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what is an accommodationaccommodation is the ability of the eye to focus on an object situated at variable distances from the eye like a camera even
explain about phosphprous and its allotrpes white phosphorus - crystalline solid p4 red phosphorus - polymeric solid scarlet phosphorus violet
what are important terms in accommodation and convergenceaccommodation and convergencein this section some important terms are includeda how a person
carbon and its allotropes diamond - an extremely hard transparent crystal with the carbon atoms arranged in a tetrahedral lattice a poor electrical
explain in detail about the allotropy allotropy refers only to dissimilar forms of an element within the similar phase or state of matter ie
give example of allotropythe element carbon has two common allotropes diamond where the carbon atoms are bonded together in a tetrahedral lattice
what is allotropy if the change in structure is reversible then the polymorphism is called as allotropyallotropy gr allos other and tropos manner
determine the coordination number cn of hcp in hcp unit cell the base centered atom touches six corner atoms in the similar plane three atoms in a
calculation of number of atoms per unit cell of hcp n one half of the each of the 2 base centre atoms 2x12 one six of the every of the 12 corner
what is the coordination number of fcc cn if we take the corner atom the face centered atoms are the nearest neighbors a corner atom has four
when designing amp constructing inductance standards what considerations must be taken into accountans construction of inductorsconstructional
current flowing in a certain pn junction at room temperature is 2 x 10-7a when a large reverse bias voltage is applied calculate current when a
explain about the physiological accommodation physiological accommodation contractile power of the ciliary muscle required to change the focussing
what is physical accommodationphysical accommodation is the actual physical deformation in the lens power it is measured in diopters eg if the
what are the common changes in the eye other changes in the eye are1 increase in curvature of anterior surface of lens 2 anterior pole of lens moves
jackson coleman and fischer theoryjackson coleman theory during accommodation the ciliary muscle contraction causes an anterior thrust of the
state in brief about gullstrands theorya change in the lens is controlled by the balance between elasticity of the lens capsule and the pull of
explain in brief about the ciliary muscleduring accommodation the ciliary muscle contracts and in turn the size of the ciliary ring is reduced this
what is the curvature of the lens in a human being and most other mammals the first three mechanisms are not possible and accommodation occurs by the
mechanisms of different species of animal in an animal when the need to change the focal power of the eye arises different mechanisms are there in
what is human eye accommodationthe human eye focuses at objects at infinity without exerting any power this means that when a person is observing an
explain the types of polymorphismin terms of thermodynamics there are two kinds of polymorphism for a monotropic system a plot of the free energy
what is packing polymorphismwhen polymorphism exists as a result of change in crystal packing it is called packing polymorphism polymorphism can also
what is polymorphismpolymorphism in materials science is the skill of a solid material to exist in more than one form or crystal structure
define the interplanar spacing in miller indicesinterplanar spacing d in a cubic latticeinterplanar spacing into a cubic crystal is specified byd