This document discusses properties of visible light. It states that light is a form of electromagnetic energy that allows us to see objects. Light travels in straight lines at about 300,000 km/s through space from a light source. Objects can be luminous sources that emit light, like the sun, or reflective objects that appear luminous by reflecting light, like the moon. Light interacts with objects in different ways - it can pass through transparent objects, be partially transmitted through translucent objects, or be blocked by opaque objects. Shadows are formed when light rays do not travel in straight lines.

2. Visible LIGHT

3. Light properties:-
 Light is a form of energy which helps us to see
objects.
 Light is an electromagnetic wave.
 Because Light is an electro magnetic wave that it
can spread without medium, so light can travels in
space with speed about 300000 km/sec.
 Light rays travel in straight lines from the light
source.

4. Light properties:-

5. How do we see objects?

6. classify this objects luminous & reflectors

7. LIGHT SOURCES
 Luminous Objects that emit light.
Ex: sun, torch , tube light…etc
 Reflectors Objects reflect light.
Ex: animals, shoe, moon (it seems glowing because of sun’s light
falling on it) etc.

8. Light properties:-
 objects interact with light in three different
ways: opaque, transparent, translucent.

9. light
source
light
source
Shadows can’t be formed if the light rays do not
travel in straight lines.

10. Quiz time
Directions:
• From the next slide answer the question
• You are going to work in 4 teams of 3 students each.
• write T if the statement is true or F if the statement is false.
• If the statement is false, change the underlined word to make it
true. Write your changes on the lines provided.
As The EX:
1- Morad is the tallest one in the class
2- Mohamed is the tallest one in the class
1- T
2- F (Morad )
• Write your answers in one sheet for each group.
• We have 5 minutes to run the activity.
10

11. 1. Electromagnetic waves can travel through space.
2. A ray of light travels in a circle.
3. An object that lets all visible light through pass is
called opaque.
4. Putting dark curtains over a window will make it
Transparent.
5. Light is a form of energy given off by anon-luminous
body

12. Pair work
• ( in 5 minutes complete the following Q.U
with one word from:
(blocks- through –reflect- opaque -scatters- source-
straight-light)

13. • Light comes from a light _1__________, and
travels in a ___2___________ line. When it
hits an object, the light __3____________,
b_________4____, or goes _5________ it.
Shadows are formed when something
___________6___ the light. Materials that
block the light are called ______7_________.
When we see things, _____8_______ enters
our eyes

14. Home work
• Study book P. 50 to 52
Do activities in the workbook P. 40 to 41 #
Choose the correct answer