click below
click below
Normal Size Small Size show me how
Chpater 4 Light and
Chapter 4 Vocabulary
Question | Answer |
---|---|
What is a plane mirror? | A mirror that has a flat surface; reflection is right side up; image is same size; virtual image |
What is a concave mirror? | A mirror that is curved inward; like inside of spoon; forms virtual and real images |
What is a convex mirror? | A mirror that curves outward; like back of spoon; forms virtual image; image is right side up and smaller than original object |
What is a lens? | A transparent that forms an image by refracting or bending light |
What is a convex lens? | A lens that is thicker in the middle than at the edges; forms a virtual image and a real image |
What is a concave lens? | A lens that is thinner in the middle than at the edges; only forms a virtual image |
What is nearsightedness? | It happens when a person's eye is too long |
What is farsightedness? | It happens when a person's eye is too short |
What is a laser? | A device that produces intense light of only one color and wavelength |
What is a hologram? | A piece of film that produces a three dimensional image of an object |