Exams › NEET › Physics

Sound waves travel at 350 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air

1. decreases by a factor 10
2. increases by a factor 20
3. increases by a factor 10
4. decreases by a factor 20

Correct answer: increases by a factor 10

Solution

The wavelength of a wave is given by λ = v/f, where v is the speed of the wave and f is its frequency. As the wave enters brass, its speed increases by a factor of 10 (3500 m/s ÷ 350 m/s), while the frequency remains constant. Therefore, the wavelength also increases by a factor of 10.

Related NEET Physics questions

• In stationary waves, nodes are the points where there is:
• How does the sound produced by a vibrating object in a medium reach your ear?
• is the distance between consecutive corresponding points of the same phase, such as crests, troughs, compressions, rarefactions or zero crossings and is a characteristic of both travelling waves and standing waves, as well as other spatial wave patterns.
• An echo is simply a........of sound.
• The condition for constructive interference is path difference should be equal to :
• In a stationary wave:

⚔️ Practice NEET Physics free + battle 1v1 →