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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for the power of a lens?
π‘ Hint: Think of how lens power relates to focal length.
Question 2
Easy
Is the power of a convex lens positive or negative?
π‘ Hint: Remember: convex lenses converge light.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the power of a lens indicate?
- How much it can expand light
- How strongly it converges or diverges light
- The thickness of the lens
π‘ Hint: Think about the effects of lenses on light.
Question 2
A concave lens has a power of -2.5D. What is its focal length?
π‘ Hint: Use the lens power formula.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A lens has a focal length of 30 cm. If combined with a concave lens of -10D, what is its total power?
π‘ Hint: Remember to use the power of both lenses in the calculation.
Question 2
In a camera, a lens with a power of +5D is used. Calculate the required focal length for clear image capture.
π‘ Hint: Use the formula relating power to focal length.
Challenge and get performance evaluation