Question

Draw a graph (not to the scale) representing the variation of square of time
period (Tº) with the length (l) of a pendulum.
If the length of a simple pendulum is increased to four times the initial
length how is the time period affected?​

Answer 1

Quantum field theory, body of physical principles combining the elements of quantum mechanics with those of relativity to explain the behaviour of subatomic particles and their interactions via a variety of force fields. Two examples of modern quantum field theories are quantum electrodynamics, describing the interaction of electrically charged particles and the electromagnetic force, and quantum chromodynamics, representing the interactions of quarks and the strong force. Designed to account for particle-physics phenomena such as high-energy collisions in which subatomic particles may be created or destroyed, quantum field theories have also found applications in other branches of physics.