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Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What happens to a pencil when placed in water?
💡 Hint: Think about how light travels through the water to the air.
Question 2
Easy
What is a lens?
💡 Hint: Consider how lenses help you see better.
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 effect called when objects appear shallower in water?
- Refraction
- Mirage
- Apparent Depth
💡 Hint: It's an optical illusion caused by refraction.
Question 2
True or False: Lenses rely on the principle of refraction.
- True
- False
💡 Hint: Consider how lenses are used in glasses and cameras.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If a swimmer is looking at a fish underwater at an angle of 30 degrees while swimming at an angle of incidence of 45 degrees, calculate the apparent depth of the fish if the refractive index of water is given as 1.33.
💡 Hint: Remember the equation: sin(i)/sin(r) = n.
Question 2
Explain how a camera lens can be adjusted to focus on objects at different distances, related to refraction.
💡 Hint: Think about how lens shapes affect light paths.
Challenge and get performance evaluation