What is Physics 

The branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.

Solid angle and Plane angle 

A plane angle, θ, made up of the lines from two points meeting at a vertex, is defined by the arc length of a circle subtended by the lines and by the radius of that circle

A solid angle, ω, made up of all the lines from a closed curve meeting at a vertex, is defined by the surface area of a sphere subtended by the lines and by the radius of that sphere

Chemistry is the branch of science that deals with the properties, composition, and structure of elements and compounds, how they can change, and the energy that is released or absorbed when they change.

What is Solid State 

Solid-state is nothing but one of the states of matter. In our early days of schooling, we have learnt that matter exists in three states – solid, liquid and gas. However, as we progress from lower to higher classes the concepts get more advanced and there are more things to learn. In this lesson, we will be dealing with the concept of solid-state in a broader aspect and understand all the underlying terms including the properties as well as the types of solids.

What is determinant