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 practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What type of lens is used to correct nearsightedness?
💡 Hint: Think of the letters 'C' in Concave and 'C' in Closer to help.
Question 2
Easy
What happens to light rays passing through a convex lens?
💡 Hint: Remember the word 'converge' starts with 'C' for 'Convex'.
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 type of lens is used to correct farsightedness?
- Concave
- Convex
- Bifocal
💡 Hint: Think about what convex lenses do.
Question 2
True or False: Concave lenses bend light inward.
- True
- False
💡 Hint: Consider the shape of a concave lens.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A person is nearsighted with a focal length of -30 cm. What type of lens is prescribed and why?
💡 Hint: Remember how lenses work with focusing.
Question 2
If a microscope has an objective lens with a focal length of 2 cm and an eyepiece with a focal length of 5 cm, what is the total magnification?
💡 Hint: What variable affects magnification in microscope usage?
Challenge and get performance evaluation