4. CONTENT STANDARD
The learners demonstrate an
understanding of the image(s)
formed by the different types of
mirrors and lenses.
5. LEARNING COMPETENCY
Predict the qualitative
characteristics (orientation, type
and magnification) of images
formed by the plane and curved
mirrors and lenses
6. LEARNING COMPETENCY
Identify ways in which the
properties of mirrors and lenses
determine their use in optical
instruments (e.g. camera and
binoculars)
9. LENS
A transparent material made of glass or
plastic that refracts and focuses light rays at
a point
Convex Lens or
Converging Lens
Concave Lens or
Diverging Lens
12. CONVEX LENS
It is thicker in the center than edges
It forms real and virtual images
depending on the position of the
object
It is also called Converging Lens
because the light that passes through
tends to converge at a particular point
called focus
13. CONCAVE LENS
It is thicker at the edge and
thinner in the center
It forms upright and reduced
image
It is also called Diverging Lens
because the light that passes
through tends to diverge at focal
point
15. Describing the IMAGE
formed
L
O
S
T
- Location of the image
- Orientation of the image
Inverted or Upright
- Size of the image
smaller, enlarged, diminish
- Type of the image
Virtual / Real
16. RAY DIAGRAMMING- Convex Lens
F
V
F
object
Principal Rays
a.P-F ray. A ray of light parallel
to the principal axis, is
refracted passing through
the focus.
b.F-P ray. A ray of light passing
through the focus (F) in front
of the lens is refracted
parallel to the principal axis
c. V ray. A ray of light passing
through the vertex continue
to travel on same direction
image
L
O
S
T
Beyond the Focus
Inverted
Bigger than the object
Real image
17. RAY DIAGRAMMING- Concave Lens
F
V
F
object
Principal Rays
a.P-F ray. A ray of light parallel
to the principal axis, is
refracted passing through
the focus in front of lens.
b.F-P ray. A ray of light passing
through the focus (F) behind
the lens is refracted parallel
to the principal axis
c. V ray. A ray of light passing
through the vertex continue
to travel on same direction
L
O
S
T
Between the focus and vertex
Upright/ erect
Smaller than the object
Virtual image
2F 2F
image
33. Lets Test Understanding
9 How will you describe an image formed
in the microscope?
a.virtual, upside-down and enlarged
image
b.Virtual, upright and smaller image
c.Real, upside down and enlarge image
d.Real, upright and smaller image
34. Lets Test Understanding
10 Which of the following describes a convex
lens?
a.Also known as diverging lens
b.It forms real and virtual image depending
on the position
c.It forms upright and reduced image
d.It is thicker at the edge and thinner at the
center
