Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
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 mock test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the speed of electromagnetic waves in a vacuum?
💡 Hint: Think about the speed of light.
Question 2
Easy
What is the refractive index?
💡 Hint: It's related to how light bends.
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 speed of electromagnetic waves in a vacuum?
- 3×10^6 m/s
- 3×10^7 m/s
- 3×10^8 m/s
💡 Hint: This speed is often referred to as the speed of light.
Question 2
True or False: The refractive index of a vacuum is greater than 1.
- True
- False
💡 Hint: Think about how light behaves in a vacuum.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the speed of light in diamond, where the refractive index is 2.42.
💡 Hint: Remember to use the given refractive index in your calculation.
Question 2
In telecommunications, if an electromagnetic wave travels through fiber optic cable at 2×10^8 m/s, what is the refractive index of the medium?
💡 Hint: Use the formula to isolate n and make your calculation.
Challenge and get performance evaluation