how we see things (grade 5)
DESCRIPTION
TRANSCRIPT
![Page 1: How we see things (grade 5)](https://reader033.vdocuments.mx/reader033/viewer/2022061222/54c38a294a79595c2f8b456d/html5/thumbnails/1.jpg)
HOW WE SEE THINGS
Grade 5
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How do we see? Which part of
your body are used to see?
The Brain
The eye
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How do we see an object?
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Light will be reflected in the same direction if it hit Polish,
Smooth, shiny and flat surfaces
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Reflection on the mirror
Mirror
Normal
Incid
ent
Ray
Reflecte
d Ray
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Reflection : Light bouncing back from a
surface
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Experiment result about reflection on mirror
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Scattered :reflection of rays in random direction
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Light hitting rough surfaces like wood, stone, paper, or wool will bounce off them in all directions (scattered)
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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
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Following are some rooms with different wall colour
The more pale the colour the more it reflects light
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PERISCOPE
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Steps to make a periscope
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3. Draw the reflection ray of following picture
40
Mirror
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4. Draw the reflection ray of following picture
40
Mirror
40
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4. Draw the reflection ray of following picture
40
Wood
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5. Which object applies reflection?
√
The other objects are applying refraction
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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
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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!
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What happen to the light when it enters different medium?
The light is bent