6.2.3.5 - Combination of Lenses
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Practice Questions
Test your understanding with targeted questions
What is the lens formula for two lenses in combination?
💡 Hint: Think about how individual lenses work together.
If a lens has a focal length of 20 cm, what is its power?
💡 Hint: Remember the formula for power involves the focal length.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the lens formula help to determine?
💡 Hint: Think about what the formula addresses.
True or False: The power of a lens is its focal length measured in meters.
💡 Hint: Recall how power is defined and calculated.
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Challenge Problems
Push your limits with advanced challenges
A system has two lenses, one converging (f = 10 cm) and one diverging (f = -20 cm). What is the effective focal length and the total magnification if both lenses are used together?
💡 Hint: Consider the signs of the focal lengths carefully!
Design an optical system with three lenses where the first lens has f = 15 cm, the second f = 10 cm, and the third f = -10 cm. What is the total effective focal length and power of the system?
💡 Hint: Keep track of the positive and negative signs during calculations!
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