Practice Refraction Principles (3.1) - Chapter 5 : Light Energy

Practise this section

9 questions

Flashcard drill
3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What happens to light when it moves from air to water?
Show hintHide hint
Think about how light travels in different substances.
Question 2.
Define refraction in your own words.
Show hintHide hint
How does changing materials impact light?
3Question 3.
What occurs when light passes into a denser medium?
- It speeds up
- It slows down
- It remains unchanged
Show hintHide hint
Consider light's behavior as it travels through different densities.
4Question 4.
True or False: Concave lenses are used to correct farsightedness.
- True
- False
Show hintHide hint
Remember which types of lenses correspond to vision problems.
Question 5.
If a light ray enters a medium with a higher refractive index from air, at an angle of 30 degrees to the normal, calculate the angle of refraction using Snell's Law if the refractive index of air is 1 and that of the new medium is 1.5.
Show hintHide hint
Use the sine function and ratios to find the angle.
Question 6.
If a person is nearsighted and can only see objects clearly within 20 cm, suggest a lens type and describe how it corrects their vision.
Show hintHide hint
Think about how light needs to be adjusted for different distances.

5 more questions in this section. Enroll free to practise them all.