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.
Share
Beats are produced when two waves of slightly different frequencies interfere with one another. This results in a sound that alternates between loud and soft at a certain frequency known as the beat frequency. This is given by,
f_beats = |f₁ – f₂|
where
– f_beats is the beat frequency
– f₁ and f₂ are the frequencies of the two interfering waves.
This would commonly be observed in sound waves by experiencing periodic variation in amplitude, which leads to a pulsating sound.
Click here for more:
https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-13/