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ตัวกลางของแสง

ข้อสอบตัวกลางของแสง

ตัวกลางของแสง แสงเดินทางเป็นแนวเส้นตรงออกจากแหล่งกำเนิดแสงทุกทิศทางแสงจะเคลื่อนที่ผ่านอากาศหรือเคลื่อนที่ผ่านสิ่งต่าง ๆ เราเรียกว่า ตัวกลาง

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