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:

Labor

The human effort, including both physical and mental, used in the production of goods and services.

Excise Tax

A tax charged on specific goods and services, such as gasoline and alcohol.

Government Revenue

The total income received by the government from taxes, fees, fines, and other sources to finance public services and goods.

Latte

A coffee drink made with espresso and steamed milk, often enjoyed for its creamy texture and rich flavor.