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Assimilation of the poem On the Eve of His Execution | Four-Level Analysis | BBA Notes 

The poem had several messages to give. I got to take a closer look as what goes on one’s mind when life is cut short and knew that everyone has love for oneself regardless of how bad one does. I also knew that anyone committing crime would be caught and punished sooner or later. This […]

Doppler’s Effect 

When the source of the sound and observer are at rest the frequency of the sound heard by observer which is emitted by source of the sound is not changed\. When the source of the sound and observer or both are in motion the frequency of the sound heard by observer which is emitted by […]


When two sound waves of same amplitude and nearly equal frequency move in the same direction then these two waves superimpose to each other giving rise to alternating hearing of the sound. This phenomenon is called Beat. The no of hearing produce in one second is beat frequency. Consider two waves having frequency f1 and […]

Intensity of sound 

Intensity of sound: The intensity of sound at a point is defined as the amount of sound energy crossing the point per unit area per second. Then the unit of intensity of the sound is given by j/m2s or wm-2.   Threshold of hearing: The threshold of hearing is the lowest intensity of the sound […]

Characteristics of musical sound 

1. Pitch: The pitch is the characteristics of a musical sound which depends upon the frequency. The sound with low frequency is low pitch able sound and the sound with high frequency is high pitch able sound.   2. Loudness: The loudness of musical sound is related to the intensity of the sound the higher […]

Vibration in the stretched string 

When a string of mass per unit length (m) under the action of tension; T; is set in to transverse vibration the velocity of the wave propagation through the string is given by m = t\m In such a vibration of the string the disturbance produced at one fixed end. Travels along the  string and […]

Velocity of sound by resonance air column tube 

The experimental setup of resonance tube experiment to determine the velocity of sound in air is shown in figure, to find the velocity of sound in air the water level in the tube is brought close to the open end of the tube by changing the place of water reservoir. A tuning fork of frequency […]