2. 1. describe how an image is formed in the ff:
a) flat mirrors c) eye
b) concave and convex mirrors
2. identify common optical instruments
3. make use of an optical instrument and describe how
objects appear while using it.
Objectives
3. - a visual representation or projection of an object
• formed in front of the mirror
• Inverted
• Can be formed on the
screen
Types of
Images Image
Virtual
Image
Real Image
• formed in a position somewhere
behind the mirror
• Upright
• Cannot be seen on a screen
4. a reflective surface, made of glass coated with metals,
which bounces off light that strikes its surface and
forms an image
Types of
Mirrors
Mirrors
5. a reflective surface, made of glass coated with metals,
which bounces off light that strikes its surface and
forms an image
-flat, 2-D surface that reflects the light coming from another object.
-obeys the law of reflection
Types of
Mirrors
Mirrors
Plane Mirrors
6.
7. • The image obtained is virtual.
• The image is laterally inverted.
• The image is erect.
• The size of the image is the same as the size of the
object.
• The distance between the image obtained from the
mirror is the same as the distance between the object
from the mirror.
IMAGES FORMED BY FLAT MIRRORS
8.
9. CONCAVE
MIRROR
• also known as converging mirrors
• has reflecting surface that is curved
INWARD
• forms images are either real or virtual
• forms images are upright or inverted
• also known as diverging mirrors
• has reflecting surface that is curved
OUTWARD
• forms images that are always reduced,
always upright, and that are only
virtual.
CONVEX
MIRROR
10. CONCAVE
MIRROR
• also known as converging mirrors
• has reflecting surface that is curved
INWARD
• forms images are either real or virtual
• forms images are
Instead, simply move closer
to maintain image quality
CONVEX
MIRROR
11.
12. • also known as converging mirrors
• has reflecting surface that is curved
INWARD
• forms images are either real or virtual
• forms images are
Instead, simply move closer
to maintain image quality
13. Ray Method of Image Formation
How can we construct, locate and describe the image formed by
spherical mirrors?
Ray 1 is an incident ray parallel to the principal axis and is reflected through the principal focus.
Ray 2 is a ray traveling along a secondary PV axis and passes through the center of curvature which is reflected back
along itself.
ƒ
Ray 3 is a ray that passes through the Fig. 2.1 focus and is reflected parallel to the Ray method of locating images
principal axis.
14. Ray Method of Image Formation
How can we construct, locate and describe the image formed by
spherical mirrors?
19. WHAT ARE LENSES?
Lenses are made of transparent substance like glass or plastic which can bend
light rays. Lenses are of two kinds:
a. Converging lens (convex) which is thicker at the middle than at the edge
b. Diverging lens (concave) which is thicker at the edge than at the middle
