1/7
Textbook: 10.2
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
Law of Reflection:
angle of incidence = angle of reflection
Normal
Perpendicular to the point of incidence(vertex).
Angles are always measured from the normal.
Image
Reproduction of an object
Produced by an optical device which is any technology that uses light(eg. mirror, lens)
Virtual Images
Cannot be visually projected on a screen.
Formed by light coming from an apparent(not real) light source.
Always upright
Appears behind mirror
Images on plane mirrors are always virtual
SALT
Size: compared to the original object is it the same size?
Attitude: which way is the image oriented compared to the original object.
Location: location of the image (in front or behind mirror)
Type: is the image a real or virtual image?
Plane Mirror Images SALT
S: object size = image size
A: ALWAYS upright
L: object distance from mirror = image distance from mirror
T: virtual image —> image is reversed (left to right)
Steps for finding an image in a Plane Mirror using Ray Diagrams
Draw a ray from the object that strikes perpendicular to the mirror surface(a normal). The virtual ray extends into the mirror the same distance.
Draw a ray that strikes the mirror at any angle and reflects so the angle of incidence = the angle of reflection. Extend the virtual ray into the mirror.
Where these two ray meet is the part of the object that appears as a virtual image.
Repeat for all points of the object
Plane mirror
Mirror with a flat, reflective surface.