8.A wavelength 2 cm is produced in air and it travels at a speed of 340 m/s. It will be anSelect an answerAultrasonic waveBaudible waveCinfrasonic waveDnone of these

To answer this question, we first need to understand the different types of sound waves:

1. Ultrasonic waves: These are sound waves with frequencies higher than the upper limit of human hearing, which is typically around 20,000 Hz or 20 kHz.

2. Audible waves: These are sound waves that can be heard by the human ear, typically in the range of 20 Hz to 20,000 Hz.

3. Infrasonic waves: These are sound waves with frequencies below the lower limit of human hearing, which is typically around 20 Hz.

Now, let's calculate the frequency of the wave using the formula:

Frequency (f) = Speed of sound (v) / Wavelength (λ)

Given, Speed of sound (v) = 340 m/s and Wavelength (λ) = 2 cm = 0.02 m

So, Frequency (f) = 340 m/s / 0.02 m = 17,000 Hz or 17 kHz

Since this frequency falls within the range of audible waves (20 Hz to 20,000 Hz), the correct answer is B. Audible wave.