An Amateur Astronomer Grinds a Double Convex Lens Whose Surfaces

question 57

Multiple Choice

An amateur astronomer grinds a double convex lens whose surfaces have radii of curvature of magnitudes 40 cm and 60 cm. The glass has an index of refraction of 1.54. What is the focal length
Of this lens when used in the night air?

• A) 130 cm
• B) 44 cm
• C) 43 cm
• D) 89 cm
• E) 220 cm

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Definitions:

Humanistic Theory

An approach in psychology that emphasizes empathy and stresses the good in human behavior.

Psychodynamic Theory

A theory in psychology which asserts that psychological processes and behaviors stem from the interaction of dynamic unconscious and conscious factors.

Cognitive-Social Theories

Theories in psychology that emphasize the roles of thought and social learning in behavior.

Personality Disorders

Types of mental disorders characterized by enduring maladaptive patterns of behavior, cognition, and inner experience, exhibited across many contexts and deviating markedly from those accepted by the individual's culture.