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- 1. Multiple Choice
A collection of geometrical points in 3-d space arranged in a regular periodic manner is called ________
lattice
basis
unit cell
primitive cell
- 2. Multiple Choice
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
- 3. Multiple Choice
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.
- 4. Multiple Choice
The lattice constant of a unit cell of a cube is 3.28 Angstrom. The interplanar spacing of ( 2 0 1 ) plane is ------ Angstrom.
1.093
1.467
1.641
0.986
- 5. Multiple Choice
The percentage of empty space in a face centre cubic arrangement is
74
52
68
26
- 6. Multiple ChoiceMonochromatic means that ?the light consist of two colorsthe light consist of only one colorthe light consist of three coloronly two light wavelengths are distinguished
- 7. Multiple ChoiceLaser stands for ?light amplification by the stimulated emission of radiation.electromagnetic radiation to which the organs of sight react
- 8. Multiple Choice
Which is an application of laser?
Medical application
Communication
Cutting metals
All of the above
- 9. Multiple Choice
What is the only type of EM waves the human eye can see?
Radio waves
Light waves
Visible light
Gamma ray waves
- 10. Multiple Choice
In He-Ne laser active energy levels for transitions are provided by
Ne atoms
He atoms
Both He and Ne
CO2 atoms
- Answer choicesTagsAnswer choicesTags