Concept of physics

06/06/2026

Today's lecture on
Transverse wave

25/05/2026

04/01/2026

The turning effect of force is called
A. Moment of force
B. Torque
C. Rotational force
D. All of these

04/01/2026

What is unit of power of lens ?
A. Henry
B. Diopter
C. Siemen
D.Tesla

04/01/2026

Which one is vector quantity?
A. Mass
B. Distance
C. Speed
D. Weight

02/01/2026

How Electromagnetic waves(EMW) produce ??
as we know Mechanical wave produce when the particles of medium vibrates but in Electromagnetic wave are medium independent ( it's means they don't need any medium for travel or propagation from one point to another point) than how it can produce?
The Electromagnetic waves are generated when a charge particle oscillate( when charge at rest it produce only electric field but if charge is motion it produce both Electric field and Magnetic field ) .
Other definition of EMW
When electric and magnetic field oscillate mutually perpendicular to each other they produce Electromagnetic waves which is perpendicular to both Electric field ( E) and Magnetic field ( B) which is shown in animation.
Electromagnetic waves are Given below
by using acronym/Namonics we can remember EMW
Rashmika (R = Radio wave )
Mandana (M= Microwave)
Is (I= Infrared)
Very (V= visible ray)
Ultimate and (U= ultraviolet ray)
Extra ordinary (EX= X-ray)
Girl (G=Gamma ray )

04/12/2025

According to Newton's second law of motion
when we apply force on body it produce acceleration in direction of force and acceleration is directly proportional to applied force and inversely proportional to mass of body.
Greater mass And less will be acceleration
Greater Force and Greater acceleration.

29/10/2025

about Refraction of Light