Miller Indices
W. H. Miller in 1839 represented the planes of a crystal by a set of three integers h, k and […]
Calculation involving Unit Cell dimensions : Theoretical Density
Theoretical Density :- Knowing the unit cell dimensions, the theoretical density d of a cubic crystal can be calculated from
Crystal Lattice, Unit Cell and its content.
Crystal Lattice :- If the three dimensional arrangement of constituent particles like atoms, molecules or ions in a crystal is
Solid state, Types of Solid and their characteristics
Solid state :- Types of Solid :- On the basis of the nature of order present in the arrangement of
Some natural phenomena of Dispersion of light : The Rainbow, Raddish appearance of horizon at Sunrise and Sunset, Scattering of light and see the Sky blue
Dispersion of light :- Dispersion of light is the phenomenon of splitting of a beam of white light into its
Dispersion by a prism, Dispersive Power, Deviation without Dispersion and Dispersion without Deviation
Dispersion by a prism :- When white light ( Sun light ) is incident on a glass prism, the emergent
Angle of Deviation , Refractive index of the Prism
Angle of deviation ( δ ) :- The passes of light through a triangular prism ABC, The angles of incidence
Equivalent focal length of two lenses separated by a distance
Equivalent focal length of two lenses :- Let us consider two lenses L₁ ( focal length f₁ ) and L₂
Combination of thin lenses in contact
Let us consider two lenses A anb B of focal length f₁ and f₂ placed in contact with each other.
Refraction of light at a spherical surface
Refraction of light at a convex surface :- 1. For real image :- The figure shows the geometry of formation
Exceptions to Mendel’s laws : Incomplete dominance, Co-dominance and Linkage
1. Incomplete dominance :- It is a post Mendelian discovery. In the case heterozygous condition of gene results in intermediate
Mendel’s laws of inheritance and Chromosomal theory of inheritance
Mendel’s laws of inheritance :- Mendel’s present his paper on principles of heredity at the annual conventy on natural history