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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the mirror equation?
💡 Hint: Think about the relationship between focal length, image distance, and object distance.
Question 2
Easy
What does positive magnification indicate?
💡 Hint: Remember how images are formed in mirrors versus lenses.
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 is the formula for the lens equation?
- \\( \\frac{1}{f} = \\frac{1}{v} + \\frac{1}{u} \\)
- \\( \\frac{1}{f} = \\frac{1}{v} - \\frac{1}{u} \\)
- \\( \\frac{1}{f} = \\frac{1}{v} \\times \\frac{1}{u} \\)
💡 Hint: Look for the formula that is specifically for lenses.
Question 2
True or False: The magnification is always positive for images formed by concave mirrors.
- True
- False
💡 Hint: Consider how images can be formed in mirrors.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a concave mirror with a focal length of 20 cm. An object is placed 15 cm in front of it. Where is the image located?
💡 Hint: Make sure to invert the distances appropriately.
Question 2
A double convex lens has a focal length of 15 cm. If an object is 30 cm from the lens, compute the image distance and magnification.
💡 Hint: Start by using the lens formula clearly and pay attention to which side the image forms.
Challenge and get performance evaluation