6.2.3.4 - Power of a Lens (P)
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Practice Questions
Test your understanding with targeted questions
What is the formula for the power of a lens?
💡 Hint: Think of how lens power relates to focal length.
Is the power of a convex lens positive or negative?
💡 Hint: Remember: convex lenses converge light.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the power of a lens indicate?
💡 Hint: Think about the effects of lenses on light.
A concave lens has a power of -2.5D. What is its focal length?
💡 Hint: Use the lens power formula.
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Challenge Problems
Push your limits with advanced challenges
A lens has a focal length of 30 cm. If combined with a concave lens of -10D, what is its total power?
💡 Hint: Remember to use the power of both lenses in the calculation.
In a camera, a lens with a power of +5D is used. Calculate the required focal length for clear image capture.
💡 Hint: Use the formula relating power to focal length.
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