If the ratio of amplitude of wave is 2: 1, then the ratio of maximum and minimum intensity is
Correct answer: A. 9:1
- A. 9:1
- B. 1:9
- C. 4:1
- D. 1:4
Explanation
Correct. Let A₁ = 2A and A₂ = A. Maximum amplitude = A₁ + A₂ = 3A Minimum amplitude = A₁ - A₂ = A Maximum intensity ∝ (3A)² = 9A² Minimum intensity ∝ (A)² = A² Ratio of maximum to minimum intensity = 9A²/A² = 9/1 = 9:1
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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