Mirror, Law of Reflection,

1. REFLECTION

2. REFLECTION
It is the bouncing off of light
rays when it hits a surface
like a plane mirror.

3. MIRROR
It is an object or device that
reflects light. Mirrors are typically
made of glass coated with metal
amalgam (alloy) that reflects a clear
image.

4. TYPES OF MIRRORS:
PLANE – has flat surface
CURVED/ SPHERICAL- has a
surface that is a section of a
shape of a sphere

5. ACT. 1: MIRROR, MIRROR ON THE WALL…
OBJECTIVES:
 Determine the height, width, and the distance from
the mirror of the image formed by plane mirrors.
Compare the actual height, width and the distance
from the mirror of the object with that of the image
formed by plane mirror.

6. Image in a plane mirror
The height of the object is ______________ to the height
of the image.
The distance of the object to the mirror _____________
to the image distance.
The image appears as if it is located behind the mirror
but it is not.
The image is virtual.
is equal
is equal

7. TYPES OF IMAGES:
REAL
- formed by actual rays of light (when rays actually
converge), it can be projected on a screen. It forms in from of
the mirror
VIRTUAL
- formed by the extension of reflected rays (due to the
rays that only appear to converge, it cannot be projected on a
screen

8. MAGNIFICATION FORMULA
Magnification
M = h’ = -q
h p
h’= height of the object
h = height of the image
-q = distance of the image
p = distance of the object

9. LAW OF REFLECTION
Incident ray = the ray of light that hits the mirror
Reflected ray = the ray of light that bounces off of the
mirror
Normal line = An imaginary line that can be drawn
perpendicular to the surface of the mirror at point of
incidence where the ray strikes the mirror.

11. The angle of
incidence if equal to
the angle of
reflection.
The incident ray, the
reflected ray and
normal line lie on the
same plane.
LAW OF REFLECTION