When a Central Dark Fringe Is Observed in Reflection in a Circular

question 22

Multiple Choice

When a central dark fringe is observed in reflection in a circular interference pattern, waves reflected from the upper and lower surfaces of the medium must have a phase difference, in radians, of

• A) 0.
• B) π/2.
• C) π.
• D) 3π/2.
• E) 2π.

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Definitions:

Child Care

The act of looking after children by a parent, guardian, or designated provider, ensuring their safety, well-being, and development.

Language Environment

The setting or context in which the use, learning, and exposure of language occurs, impacting linguistic development.

Child-teacher Ratio

The proportion of students to teachers in a learning environment, indicating the level of individual attention a student might receive.

Acculturation

The process by which individuals or groups adopt the cultural traits or social patterns of another group, often occurring during immigration or when cultures intersect.