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Light
Light sources
•Natural sources
•Artificial sources
• What are the important of light?
Source of Light
Toys and appliances
• Toys- ของเล่น K̄hxnglèn
• Appliances- เครื่องใช้ไฟฟ้า Kherụ̄̀xng
chı̂ fịf̂ā
Source of Light
Source of Light
Source of Light
Electrical appliances
fan
iron
Refrigerator
Source of Light
Source of Light
Natural sound
Lightning
Source of Light
Man made sound

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Source of Light