A quantity which does not have the basic physical units such as length, mass, temperature, etc. There are many quantities that do not have any physical unit but are used in measurements. Ex:-1, i, π, googol,etc.
Explain what is monochromatic light ?
Light of one wavelength or colour is known as monochromatic light. Ex:- Red colour means only 1 colour or wavelength i.e only and does not include any other colours.
Extra information:-
Scalar quantity:-
Scalar quantities are quantities that have only magnitude. They do not have a direction. Ex:-Mass, Speed, Distance, etc.
Vector quantity:-
Vector quantities are quantities that have both magnitude and direction. Ex:-Displacement, Velocity, etc.
Polychromatic light:-
Light having many wavelengths or colours is known as polychromatic light. Ex:- White colour consists of all 7 colours i.e it is a mixture of all 7 colours.
What is light:-
Light refers to electromagnetic radiation (EC) whether it is visible or not. Under visible: visible light and under invisible: radio waves, infrared, UV,etc. Light has dual nature i.e both as particle and wave.
Answers & Comments
What is a dimensionless quantity ?
A quantity which does not have the basic physical units such as length, mass, temperature, etc. There are many quantities that do not have any physical unit but are used in measurements. Ex:- 1, i, π, googol,etc.
Explain what is monochromatic light ?
Light of one wavelength or colour is known as monochromatic light. Ex:- Red colour means only 1 colour or wavelength i.e only and does not include any other colours.
Extra information:-
Scalar quantity:-
Scalar quantities are quantities that have only magnitude. They do not have a direction. Ex:- Mass, Speed, Distance, etc.
Vector quantity:-
Vector quantities are quantities that have both magnitude and direction. Ex:- Displacement, Velocity, etc.
Polychromatic light:-
Light having many wavelengths or colours is known as polychromatic light. Ex:- White colour consists of all 7 colours i.e it is a mixture of all 7 colours.
What is light:-
Light refers to electromagnetic radiation (EC) whether it is visible or not. Under visible: visible light and under invisible: radio waves, infrared, UV,etc. Light has dual nature i.e both as particle and wave.