Two waves of slightly different frequencies interfere to produce

Frequencies measure how often something happens within a specific period. They are used in physics, engineering, music, and communication. In sound, they determine pitch. In radio, they help transmit signals. Higher frequencies mean shorter wavelengths. Lower frequencies travel farther. Measured in hertz, they influence technology, science and daily life.

Oscillations in Class 11 Physics cover periodic motion where objects move to and fro about a mean position. This chapter explains simple harmonic motion, time period, frequency and amplitude. It includes energy in oscillatory motion and damped and forced oscillations. Essential for CBSE Exam 2024-25, it helps understand waves, sound and mechanical vibrations in physics.