Ray Optics: Refraction and Lenses
Refraction and Lenses: Audio Guided Solution
Problem 29:
An upright image is reduced to one-fourth of the object’s height when the object is placed 26.9 cm from the lens. Determine the focal length of the lens.
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities and record them in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., do = 24,8 cm; di = 16.7 cm; f = ???.
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Get more information on the topic of Refraction and Lenses at The Physics Classroom Tutorial.
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