4.2 - Important Terms
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is the Incident Ray?
💡 Hint: Think about the ray's initial path before it meets the surface.
Define the term 'Normal'.
💡 Hint: Imagine standing straight up next to a wall.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the term for the ray of light that strikes the surface?
💡 Hint: It’s the ray ‘incident’ upon the surface.
True or False: The Angle of Refraction is measured between the refracted ray and the normal.
💡 Hint: Think where the refracted ray goes after bending.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
Given that the angle of incidence is 45 degrees and the angle of refraction is 30 degrees, calculate the refractive index of the second medium. Show your working.
💡 Hint: Use the relationship of angles and sine values.
If light travels from air (n=1.00) into water (n=1.33) at an angle of incidence of 60 degrees, what is the angle of refraction?
💡 Hint: Remember to rearrange Snell's Law according to the formula.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.