MHT-CET : Physics Entrance Exam

### MHT - CET : Physics - Stationary Waves Glossary

 ·         Stationary Wave: It is the resultant of two progressive waves having same amplitude, same frequency and directed opposite along the same line. ·         Nodes: The points on a stationary wave where the resultant amplitude is zero. ·         Antinodes: The points on a stationary wave where the resultant amplitude is maximum. ·         Fundamental Mode: Simplest mode of vibration. ·         Fundamental Frequency: Frequency of vibration in the fundamental mode. ·         Harmonics: Integral multiples of the fundamental frequency. ·         Overtones: Frequencies that accompany fundamental frequency. ·         First Law of Vibrating String/Law of Length: If tension and mass per unit length are kept constant, the fundamental frequency of the vibrating string is inversely proportional to its vibrating length. ·         Second Law of Vibrating String/Law of Tension: If the length and mass per unit length are kept constant, the fundamental frequency of the vibrating string is directly proportional to the square root of tension. ·         Third Law of Vibrating String/Law of Mass Per Unit Length: If the tension and length are kept constant the fundamental frequency of the string is inversely proportional to the square root of mass per unit length of the wire. ·         Free Vibrations: When a body vibrates at its natural frequency, the vibrations are called free vibrations. ·         Forced Vibrations: If a body is made to vibrate by an external periodic force at a frequency different from the natural frequency, the vibrations are known as forced vibrations. ·         Resonance: If a body is made to vibrate by an external periodic force, with a frequency which is same as the natural frequency of the body, the body vibrates with maximum amplitude. This is called resonance. ·         Sonometer: An instrument used to determine the frequency of a tuning fork and also to verify the laws of vibrating strings. ·         Transverse Position in Melde's Experiment: The position in which the prongs of a tuning fork vibrate perpendicular to the length of the string. ·         Longitudinal Position in Melde's Experiment: The position in which the prongs of a tuning fork vibrate parallel to the length of the string.

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