physics notes for Heat capacity

Heat capacity
The heat capacity of a body of any kind is defined as the heat required to raise its
temperature by 1 degree centigrade.
Specific Heat Capacity.
The specific heat capacity of a substance is defined as the heat required to raise
the unit mass through 1 degree centigrade.
Latent heat of vapourisation
the specific latent heat of vapourisation of a substance is the quantity of heat
required to change the unit mass of the substance from liquid to vapour state
without a change in temperature.
Latent heat of fusion
The specific latent heat of fusion of a substance is the quantity of heat required to
convert the unit mass of the substanee from solid to liquid state without a change in
temperature.
SVp
A saturated vapour is one which is a state of dynamic equlibrium with its own liquidor
solid.
Boiling point
The boiling point of a substance is defined as the temperature at which its saturation
vapour pressure becomes equal to the external atmospheric pressure.
Dew point.
The dew point is defined as the temperature at which the water vapour pressure present
in the air is just sufficient to saturate it.
Laws of reflection
The incedent ray the reflected ray and the normal at the point of incedence all lie
on the dame plane. The angle of incedence is equal to the angle of reflection.
Principle focus
The principle focus of a spherical mirror is that point on the principal axis to which
all rays originally parallel and close to the principal axis converge , or from which
they appear to diverge after reflection from a mirroe.
Conjugate foci are any pair of points such that an object placed at one of them gives
rise to a real image at tie other.
Snells law.
The ratio of the sine of the angle of incedence to the sine of the angle of refraction
is a constant.
Focal length
The focal length of a lens is the distance between the optical centre and the principal
focus.
Amplitude
The maximum displacement of a particle from rest position is called the amplitude of a
wave.