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MHT-CET : Physics Entrance Exam

MHT - CET : Physics - Stationary Waves Glossary

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         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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