3.2 - Lens Formula
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Practice Questions
Test your understanding with targeted questions
What is the Lens Formula for lenses?
💡 Hint: Look for the relationships between focal length, object distance, and image distance.
What does a positive value for focal length indicate?
💡 Hint: Think about how lenses converge or diverge light.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the Lens Formula?
💡 Hint: It's a key concept of geometric optics.
True or False: A concave lens can produce a real image.
💡 Hint: Think about how concave lenses behave with light.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A convex lens has a focal length of 15 cm. An object is placed 45 cm from the lens. Calculate the image distance and state whether the image is real or virtual.
💡 Hint: Rearrange the formula carefully.
A concave lens has a focal length of -12 cm. If an object is positioned at 30 cm from the lens, determine the image distance and type of image formed.
💡 Hint: Be cautious with the signs in the formula.
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