We use lenses to help us see objects everyday. Magnifying glasses are a special lens that helps us look at objects close up, and telescopes use special lenses to help us see objects that are far away.
Many people wear glasses to help them see better. Some people have trouble seeing objects that are far away, but can clearly see up-close objects. They have a condition called Myopia, or nearsightedness. Other people have difficulty seeing objects up close, but are able to see distant objects with ease. This is a condition called Hyperopia, or farsightedness. These conditions are caused by a misshapen eyeball, and we'll learn more about how our eyes work later this week.
Depending on whether a person needs help seeing up close, or far away, wearing glasses with a convex or a concave lens can improve one's sight.
Problem:
Your friend Ralph tells you that he needs glasses so that he can see the front board in Science class. Considering the shapes of the convex and concave lenses on the previous page, predict which type of lens Ralph will need to allow him to better see the board. Write your prediction down in your notebook, and provide a brief explanation. Then, share your prediction and explanation with your neighbor.
Next we are going to investigate convex and concave lenses so that we can see if your predictions will help get Ralph the glasses he needs!
With a partner, collect the activity materials from your basket at the front of the class. Each partner should have their own copy of the activity worksheet and a pencil. Work with your partner to answer the questions, and when you are finished, please go to the next page. If you need help with any part of the activity, please ask the teacher.
Many people wear glasses to help them see better. Some people have trouble seeing objects that are far away, but can clearly see up-close objects. They have a condition called Myopia, or nearsightedness. Other people have difficulty seeing objects up close, but are able to see distant objects with ease. This is a condition called Hyperopia, or farsightedness. These conditions are caused by a misshapen eyeball, and we'll learn more about how our eyes work later this week.
Depending on whether a person needs help seeing up close, or far away, wearing glasses with a convex or a concave lens can improve one's sight.
Problem:
Your friend Ralph tells you that he needs glasses so that he can see the front board in Science class. Considering the shapes of the convex and concave lenses on the previous page, predict which type of lens Ralph will need to allow him to better see the board. Write your prediction down in your notebook, and provide a brief explanation. Then, share your prediction and explanation with your neighbor.
Next we are going to investigate convex and concave lenses so that we can see if your predictions will help get Ralph the glasses he needs!
With a partner, collect the activity materials from your basket at the front of the class. Each partner should have their own copy of the activity worksheet and a pencil. Work with your partner to answer the questions, and when you are finished, please go to the next page. If you need help with any part of the activity, please ask the teacher.
lensactivity.doc | |
File Size: | 82 kb |
File Type: | doc |