A Concave Mirror Forms a Real Image Which Is Twice

question 52

Multiple Choice

A concave mirror forms a real image which is twice the size of the object.If the object is 20 cm from the mirror, the radius of curvature of the mirror must be about:

• A)13 cm
• B)20 cm
• C)27 cm
• D)40 cm
• E)80 cm

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Definitions:

Trichromatic Color Theory

A theory stating that the human eye perceives color through the relative rates of response by three types of cones, each sensitive to different wavelengths of light (red, green, and blue).

Trichromatic Color

A theory of color vision based on the existence of three types of cone cells in the eye, each sensitive to red, green, or blue light.

Complex Cortical Cell

A type of neuron in the cerebral cortex that responds to visual stimuli with certain characteristics, such as orientation, movement, and length.

Temporal Cortex

A region of the cerebral cortex involved in processing auditory information and is critical in understanding language and storing new memories.