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A collection of geometrical points in 3-d space arranged in a regular periodic manner is called ________
In primitive cells the lattice points are ___________
only inside the cell
only at the corners
either inside the cell or at the corners
neither inside the cell nor at the corners
Which of the following is not correct?
Crystalline solids are anisotropic.
Lattice + Basis = Crystal
The various crystal planes are specified by a set of three numbers called Miller indices.
All Unit cells are Primitive cells.
The lattice constant of a unit cell of a cube is 3.28 Angstrom. The interplanar spacing of ( 2 0 1 ) plane is ------ Angstrom.
The percentage of empty space in a face centre cubic arrangement is
Which is an application of laser?
All of the above
What is the only type of EM waves the human eye can see?
Gamma ray waves
In He-Ne laser active energy levels for transitions are provided by
Both He and Ne