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:

Future Value

Financial value of an asset or cash set for a future date, equivalent to a fixed present sum.

Annuity

A financial instrument that provides a consistent series of payments to a person, often utilized in planning for retirement.

Continuous Compounding

The process of calculating interest on an investment or loan continuously, leading to the accumulation of interest upon interest, often resulting in higher yields.