Plane Waves of Ultrasound, F = 51

question 40

Multiple Choice

Plane waves of ultrasound, f = 51.0 kHz, impinge on a flat plane with a 1.00-cm-wide slit. What is the total angular width (2θ) of diffracted sound waves when the speed of sound in air is 340 m/s.

• A)167°
• B)83.6°
• C)19.5°
• D)41.8°
• E)0.11°

---

Definitions:

Demand Curve

A visual display illustrating how the quantity demanded of a product varies with changes in its price, typically sloping downward from left to right.

Short Run

A period of time in economics during which at least one input, such as plant size or capital, remains fixed while others may vary.

Long Run

A period during which all factors of production and costs are variable, allowing for full adjustment to changes.

Perfect Competition

Perfect competition is a market structure where many firms offer a homogeneous product or service, and no single firm can influence the market price.