Lesson 1463 of 1524
Geometric Optics and Image Formation
Spherical aberration occurs for spherical mirrors but not parabolic mirrors; comatic aberration occurs for both types of mirrors
Practice this chapterSpherical aberration occurs for spherical mirrors but not parabolic mirrors; comatic aberration occurs for both types of mirrors The image and object are the same distance from a flat mirror, the image size is the same as the object size, and the image is upright
A plane mirror always forms a virtual image (behind the mirror) The focal length of a spherical mirror is one-half of its radius of curvature: f = R / 2
image and object — the same distance from a flat mirror, the image size is the same as the object size, and the image is upright. coma — similar to spherical aberration, but arises when the incoming rays are not parallel to the optical axis. spherical aberration — distortion in the image formed by a spherical mirror when rays are not all focused at the same point. virtual image — image that cannot be projected on a screen because the rays do not physically go through the image, they only appear to originate from the image.
Worked example
What does “image and object” mean in Geometric Optics and Image Formation?
- 1Use the wording this chapter gives for image and object.
- 2The book says: the same distance from a flat mirror, the image size is the same as the object size, and the image is upright.
- 3Do not use the meaning of coma. That term means similar to spherical aberration, but arises when the incoming rays are not parallel to the optical axis.
Result: the same distance from a flat mirror, the image size is the same as the object size, and the image is upright
Why. That is the meaning this chapter gives for image and object.
Do not swap image and object and coma. image and object means the same distance from a flat mirror, the image size is the same as the object size, and the image is upright. coma means similar to spherical aberration, but arises when the incoming rays are not parallel to the optical axis.
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.