Terminologies

A

Acceleration

The rate of change of velocity of a moving object is called as acceleration. Its unit is \(m/s^2\).

Action Force

The simultaneously acting force with the reaction force. Its not the cause.

Apparent depth

The depth at which an object appears due to refraction.

C

Curie temperature

The temperature at which the ferromagnetic or ferrimagnetic material loses its strong magnetic properties and its phase is change to paramagnetic phase is called Curie temperature.

D

Deviation of light

The change in the direction of light due to refraction.

Diamagnetism

The weak and negative response of a material to an external magnetic field is termed as diamagnetism.

Dispersion

Splitting of white light into its different colors due to refraction.

E

Electromagnetism

It is the branch of physics that studies the relationship between electricity and magnetism.

F

Ferromagnetic

A ferromagnetic materials is one that can become a strong permanent magnet.

Friction

The resistance force that one surface or object encounters when moving over another.

I

Inertial frame

An inertial frame is a reference frame that is not accelerating or rotating, where objects move with constant velocity unless acted on by a net external force.

Interaction

The third law is applied only when two objects interact with each other.

M

Magnetism

It is the property of materials to attract or repel each other because of the motion and alignment of electrons.

Momentum

Momentum is the “quantity of motion” of an object–the product of its mass and velocity, \(\vec p=m{\vec v}\). It’s vector and takes the direction of velocity.

P

Paramagnetism

It is the weak, positive magnetization of a material in response to an applied magnetic field, due to the presence of unpaired electrons.

R

Reaction Force

The force which is always equal and opposite of action force, without any time delay.

T

Total Internal Reflection

Complete reflection of light when the angle of incidence exceeds the critical angle.

U

Uniform motion

A straight-line motion at constant speed. Even at constant speed, turning needs a centripetal force, hence only a straight-line motion.