1. By Smiley Teacher TPT The Definition of Light Energy Colours of Light
Sources of Light Energy
Reflection of Light
The Travel of Light
The Speed of Light
Objects & Light
(Transparent, Translucent, Opaque)
Shadows (the Shapes and Sizes)
The sun and Shadow
Play with Shadows
By Smiley Teacher TPT

2. is
It is made of electro-magnetic radiation.

3. There are different colours of light
because they are light waves
which have different wavelengths.
Red light has the longest wavelength
while violet light has the shortest wavelength

4. Mixing them in various ways will make all other colours,
including white.

6. Lightning Starlight Sunlight Bioluminescence Aurorae Flame Glow worm
Firefly
Bioluminescence
Aurorae
Jelly Fish
Flame

7. Electric bulb
Torch
Firework
Candle
Traffic light
Television

8.  The law of reflection
The bouncing back of light waves
when they hit an object
with a very smooth
and shiny surface,
like a mirror

9. The Law of Reflection

10. Light travels in a straight line.

11. Light travels in straight lines.

12. The speed of light
is the speed at which light travels.
It is about 300,000 kilometres per second.
Nothing travels faster than light.

13. There are 3 types of objects depending on
amount of light they allow to pass through them:

14. Transparent objects allow all the light to pass through which fall on them.
Clear Water
Clear Plastic
Clear Glass
Clear Air

15. Translucent objects allow only some amount of light to pass through.
Wax Paper
Cellophane
Frosted Glass
Translucent Plastic

16. Opaque objects do not allow light to pass through them.
Wood block
Books
Stone
Metals

17. Opaque objects form shadows when light falls on them,
as shadow is absence of light,
the opaque objects obstruct the light rays and do not allow light to pass through them,
and shadows are formed.

18. There are 3 kinds of Shadows
Dark Shadow
Faint Shadow
Light is blocked by transparent object
Light is blocked by opaque object
Lighter Shadow
Light is blocked by translucent object

19. A shadow shows the shape of an object, but it doesn’t show colors or details (such as a smile or a frown).

20. You can change the shape of a shadow by moving and turning your body or the object.
You can combine shadows to make different shadow shapes

21. You can change the size of a shadow by moving your body or the object closer to or farther from the light. (Shadows grow bigger and fuzzier as the object moves closer to the light source, and smaller and sharper as the object moves farther away.)

22. The sun rises in the East and sets in the West, allowing us to work out direction.

23. Outdoors, a shadow’s shape, size, and position change over the course of the day as the position of the sun changes.

24. The shadow is longer in the morning and evening.
4.00 p.m.
8.00 a.m.
12.00 a.m.
The shadow is longer in the morning and evening.
The shadow is shortest at the midday.

25. Puppet Shadow

26. Hand Shadow

28. Thank you
Credit: And Other sources of Knowledge