Kundt's tube can be used to

Options

A. Produce standing wae
B. Determine viscosity of water
C. Produce Doppler's effect in sound
D. Determine velocity of the source of the disturbance.

Explanation

**Step-by-Step Solution:**

1. **Understanding Kundt's Tube:**
Kundt's tube is an experimental apparatus used in acoustics to study sound waves. It consists of a long tube filled with a fine powder and is used to visualize sound waves.

2. **Principle of Kundt's Tube:**
The principle behind Kundt's tube is that when sound waves travel through the tube, they can create standing waves. These standing waves occur due to the interference of the incident and reflected sound waves.

3. **Application of Kundt's Tube:**
Kundt's tube is primarily used to measure the velocity of sound in different mediums, particularly in gases and solids. By analyzing the patterns of the standing waves formed in the tube, one can determine the wavelength of the sound waves.

4. **Calculating Velocity of Sound:**
The velocity of sound (v) can be calculated using the formula:
\[ v = f \lambda \]
where \( f \) is the frequency of the sound wave and \( \lambda \) is the wavelength. In the case of Kundt's tube, the wavelength can be determined from the distance between the nodes or antinodes of the standing wave pattern.

5. **Conclusion:**
Therefore, Kundt's tube is used to calculate the velocity of sound in a medium by producing standing sound waves.

6. **Selecting the Correct Option:**
Based on the explanation, we can conclude that the correct option is A, which states that Kundt's tube can be used to calculate the velocity of sound.

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