For a Coherent Plane Wave Approaching an Obstacle with a Rectangular

question 19

Multiple Choice

For a coherent plane wave approaching an obstacle with a rectangular opening, diffraction becomes significant under which of the following circumstances?

• A) both dimensions of the rectangular opening are comparable to the wavelength
• B) one or more dimensions of the rectangular opening are comparable to the wavelength
• C) both dimensions of the rectangular opening are larger than the wavelength
• D) only if the opening is circular

Calculate expected breakdown costs and understand the financial implications of machine failures.

Recognize effective maintenance practices for high reliability in critical infrastructure.

Identify costs that are often overlooked in maintaining an optimal maintenance policy.

Understand the role of preventive maintenance plans in reducing the likelihood of machine failures.