A laser beam has following important characteristics: Divergence or directionality: laser is highly directional beam. monochromaticity: laser is monochromatic that is it has single wavelength
The lasers can be classified by various ways, as explained below: a) State of laser medium: According to state of laser medium, we have solid
Coercivity is defined as the value of the magnetising field at which the intensity of magnetisation becomes zero. It is also known as coercive field.
The magnetism remaining in the magnetic material, even when the magnetising field is reduced to zero is called residual magnetism. The power of retaining this
Soft magnetic materials have low retentivity and low coercivity. These are those materials which have high initial permeability, low hysterisis loss and large magnetic induction.
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