Questions: A strong lens will have a ・ A. long focal length B. long object distance C. short focal length D. short object distance

A strong lens will have a ・
A. long focal length
B. long object distance
C. short focal length
D. short object distance
Transcript text: A strong lens will have a $\qquad$ ・ A. long focal length B. long object distance C. short focal length D. short object distance
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Solution

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Solution Steps

Step 1: Understanding the Concept of Lens Strength

The strength of a lens is determined by its ability to bend light. A stronger lens bends light more sharply, which is related to its focal length. The focal length is the distance from the lens to the point where it focuses light.

Step 2: Analyzing Focal Length

A lens with a short focal length bends light more sharply and is considered stronger. Conversely, a lens with a long focal length bends light less sharply and is considered weaker.

Step 3: Identifying the Correct Option

Given the options, a strong lens is characterized by a short focal length. Therefore, the correct choice is the one that describes a lens with a short focal length.

Final Answer

\(\boxed{\text{C. short focal length}}\)

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