A Concave Spherical Surface with Radius R Separates a Medium

question 24

Multiple Choice

A concave spherical surface with radius r separates a medium with index of refraction 2 from air.As an object in air is moved toward the surface from far away along the central axis, its image:

• A)changes from virtual to real when it is a distance r/2 from the surface
• B)changes from virtual to real when it is a distance 2r from the surface
• C)changes from real to virtual when it is a distance r/2 from the surface
• D)changes from real to virtual when it is a distance 2r from the surface
• E)remains virtual

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Definitions:

Encoding Specificity

The principle that recall is more effective when the context at the time of encoding matches the context at the time of retrieval.

Retrograde Amnesia

A condition characterized by an inability to recall memories formed before the onset of amnesia.

Global Amnesia

A rare condition characterized by the sudden loss of all memories and the ability to form new ones, often temporary and without an identifiable cause.

Procedural Amnesia

A type of memory loss where an individual is unable to recall how to perform certain tasks or procedures, despite understanding and remembering the task itself.