This document discusses how vision works and the science of reflection. It explains that light reflects off shiny, smooth surfaces like mirrors, while it scatters off rough surfaces. When light hits different materials, it may reflect, scatter, or refract. Reflection causes light to bounce back at the same angle, while refraction bends the light. Experiments are described to observe reflection using mirrors and the bending of light when it passes through water or other transparent materials.

1. HOW WE SEE
THINGS
Grade 5

2. How do we see?
 Which part of your The
Brain
body are used to
see? The eye

3. How do we see an object?

5. Light will be reflected in the
same direction if it hit Polish,
Smooth, shiny and flat surfaces

6. Reflection on the mirror
nt
Re Ra
de y
ci a
fle y
Normal
In R
ct
ed
Mirror

7. Reflection :
Light bouncing back from a surface

8. Experiment result about reflection
on mirror

9. Scattered :
reflection of rays in random direction

10. Light hitting rough
surfaces
like wood, stone,
paper, or wool will
bounce off them in
all directions
(scattered)

11. Testing Reflective Materials
Pale colour reflects more light than dark one. And mirror is the
best material to reflect most light because it smooth and shiny

12. Following are some rooms with different wall colour
The more pale the colour the more it reflects light

13. PERISCOPE

14. Steps to
make a
periscope

15. 3. Draw the reflection ray of following
picture
40
°
Mirror

16. 4. Draw the reflection ray of following
picture
40 40
° °
Mirror

17. 4. Draw the reflection ray of following
picture
40
°
Wood

18. 5. Which object applies reflection?
√
The other objects are applying refraction

19. Take a straw then insert it into a glass of
water
Draw the image of straw and glass from the
side of the glass then tell the changes

20. Take a clear plastic sheet. Drop a drop of water on
to the plastic using a straw. Put the drop of water
over a printed text!
Draw the image of printed text under the
drop of water then tell the changes!

21. What happen to the light when it
enters different medium?
The light is bent