5 - Summary
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Practice Questions
Test your understanding with targeted questions
What is the angle of reflection equal to?
💡 Hint: Think about the law of reflection.
State Fermat's principle in your own words.
💡 Hint: Consider the significance of time.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
According to Snell’s Law, what does $$ n_1 \sin(i) $$ equal to?
💡 Hint: Remember the relationship between the angles.
True or False: Light bends towards the normal when it enters a denser medium.
💡 Hint: Think about what happens to light speed.
3 more questions available
Challenge Problems
Push your limits with advanced challenges
A beam of light enters from air to glass at an angle of 45 degrees. If the index of refraction of glass is 1.5, calculate the angle of refraction.
💡 Hint: Apply Snell’s Law carefully, remember to handle the sin function.
A concave mirror has a focal length of 20 cm. An object is placed 30 cm away from the mirror. Using the mirror equation, find the position of the image.
💡 Hint: Don’t forget the sign convention based on object placement.
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Reference links
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