Lesson 902 of 1524
How We See the Invisible World
A lens is a medium with a curved surface that refracts and focuses light to produce an image
Practice this chapterA lens is a medium with a curved surface that refracts and focuses light to produce an image Light waves interacting with materials may be reflected , absorbed , or transmitted , depending on the properties of the material
Light waves can interact with each other ( interference ) or be distorted by interactions with small objects or openings ( diffraction ) Refraction occurs when light waves change speed and direction as they pass from one medium to another.
lens — a medium with a curved surface that refracts and focuses light to produce an image.
Be able to identify and define the characteristics of electromagnetic radiation (EMR) used in microscopy; explain how lenses are used in microscopy to manipulate visible and ultraviolet (UV) light; explain how a lens focuses light at the image point.
Worked example
What does “lens” mean in How We See the Invisible World?
- 1Use the wording this chapter gives for lens.
- 2The book says: a medium with a curved surface that refracts and focuses light to produce an image.
- 3Keep the answer tied to this term.
Result: a medium with a curved surface that refracts and focuses light to produce an image
Why. That is the meaning this chapter gives for lens.
Answer with the meaning this chapter gives. A nearby idea from the same book is a different term.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.