Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium
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Figure 10.1 shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is
(a) √3/√2 is the correct option
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What are wavelength, frequency, time period and amplitude of a sound wave?
Wavelength: The distances between two consecutive compressions or rarefaction of a wave. Its S.I unit is meter. Frequency: One compression and one rarefaction constitutes one vibration. The number of vibration in...
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How are the wavelength and frequency of a sound wave related to its speed?
Speed = Wavelength x frequency V = λ × ν
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Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate
Derivation of formula v = ν λ. (i) 340 = 256 λ λ = 1.33 m. (ii) 340 = ν (0.85) ...
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Two waves of equal amplitude A, and equal frequency travel in the same direction in a medium. The amplitude of the resultant wave is.
(d) between 0 and 2A. EXPLANATION: The amplitude of the resultant wave depends on the phase difference between the two waves. If the phase difference is zero then the resultant amplitude is...
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A mechanical wave propagates in a medium along the X-axis. The particles of the medium
(c) may move on the X-axis (d) may move on the Y-axis. EXPLANATION: Mechanical waves are either transverse or longitudinal. In the transverse wave, the particles will move on Y-axis while in the...
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The speed of sound in a medium depends on (a) the elastic property but not on the inertia property
(c) the elastic property as well as the inertia property EXPLANATION: The speed of the sound in a fluid is V = √(B/ρ) and in a longitudinal solid rod V = √(Y/ρ)...
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Two sound waves move in the same direction in the same medium. The pressure amplitudes of the waves are equal but the wavelength,
The correct answer is (a) P1= P2 EXPLANATION: Let the cross-section area = A, if the intensity of the first wave at this cross-section = I₁ and of the second wave =...
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The speed of light depends (a) on elasticity of the medium only (b) on inertia of the medium only
(d) neither on elasticity nor on inertia. EXPLANATION: The light does not require even a medium. The speed of light in a medium is the intrinsic property of that medium which...
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When light is refracted into a medium, (a) its wavelength and frequency both increase
(c) its wavelength decreases but frequency remains unchanged EXPLANATION: When light is refracted into a medium its speed changes but the frequency remains the same because the energy associated with a...
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