Physics
Definitions
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Insulators
: Those whose electrical conductivity is negligible are
called insulators. e.g. mica, glass, wood, rubber etc. |
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| Interference
: The phenomenon of redistribution of light energy in
a medium as a result of the superposition of light waves from
two coherent sources is called interference. |
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| Illuminated
Objects : An object that is seen because light is reflected
from it is said to be illuminated. |
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| Impact
Parameter : The perpendicular distance of the velocity
vector of the α-particle from the centre of the nucleus
when the α-particle is far away from the nucleus is called
impact parameter. It is denoted by b. |
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Ionisation
: An atom that has lost an electron is said to be
ionised. |
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Ionisation
Energy : The minimum energy required to ionise an atom
is called ionisation energy. |
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| Isotones
: The nuclides which contain the same number of neutrons
are called isotones. Example, 15P31
and 16S32 are the isotones because the
nuclides of both contain the same (i.e. 16) neutrons. |
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| Interfacial
Angles : The angles between the three crystallographic
axes are known as interfacial angles. |
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| Intrinsic
Semiconductor : A semiconductor in an extremely pure from
is known as an intrinsic semiconductor. |
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| Ionosphere
: The upper portion of atmosphere about 50 km to 400 km
above the earth's surface is called ionosphere. |
