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กลุ่มสาระการเรียนรู้
วิทยาศาสตร์ ว 30284
ชั้นมัธยมศึกษาปีที่ 5
ใบงานที่ 2
แบบทดสอบ4 ข้อ
เรื่อง ความสัมพันธ์ของคลื่น
ใช้ประกอบแผนการเรียนรู้ที่ 1
เวลา 15 นาที
ชื่อ(นาย/นางสาว).........................................................................ชั้นมัธยมศึกษาปีที่ 5./..........เลขที่...............
1.
A B
0.4m
จากรูป A  B ใช้เวลา 4 วินาที จงหาว่ามีความเร็วคลื่นเท่าไร
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
2. คลื่นหนึ่งมีความถี่ 8,000 Hz มีความยาวคลื่น 0.6 m. ถ้าปล่อยให้เคลื่อนที่เป็นเวลา 8 วินาที
ไปได้ไกลกี่เมตร
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
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...........................................................................................................................................
V= f y
; 1) = 3.5/4 = 0.875 Hz
2) = 0.4 m
; V= 0.875 Hz x 0.4 m
3. เรดาห์ปล่อยความถี่ 109
Hz เพื่อตรวจวัตถุอยู่ห่าง 5 km. จงหาจะใช้เวลาเท่าไรจึงจะสะท้อน
กลับมา ถ้าคลื่นเรดาร์มีความยาวคลื่น 0.5 m.
...........................................................................................................................................
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4. สถานีวิทยุเครื่องหนึ่งส่งกระจายเสียงด้วยความถี่ 5 กิโลเฮิร์ต มีความยาวคลื่น 30 เมตร ด้วย
เวลา 10 วินาที่ จงหา
4.1 ความเร็วของคลื่นมีค่าเท่าไร
4.2 ระยะทางที่คลื่นเคลื่อนที่ได้
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ใบงานที่ 2 แบบทดสอบ รังสีที่มองไม่เห็น

  • 1. กลุ่มสาระการเรียนรู้ วิทยาศาสตร์ ว 30284 ชั้นมัธยมศึกษาปีที่ 5 ใบงานที่ 2 แบบทดสอบ4 ข้อ เรื่อง ความสัมพันธ์ของคลื่น ใช้ประกอบแผนการเรียนรู้ที่ 1 เวลา 15 นาที ชื่อ(นาย/นางสาว).........................................................................ชั้นมัธยมศึกษาปีที่ 5./..........เลขที่............... 1. A B 0.4m จากรูป A  B ใช้เวลา 4 วินาที จงหาว่ามีความเร็วคลื่นเท่าไร ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... 2. คลื่นหนึ่งมีความถี่ 8,000 Hz มีความยาวคลื่น 0.6 m. ถ้าปล่อยให้เคลื่อนที่เป็นเวลา 8 วินาที ไปได้ไกลกี่เมตร ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... V= f y ; 1) = 3.5/4 = 0.875 Hz 2) = 0.4 m ; V= 0.875 Hz x 0.4 m
  • 2. 3. เรดาห์ปล่อยความถี่ 109 Hz เพื่อตรวจวัตถุอยู่ห่าง 5 km. จงหาจะใช้เวลาเท่าไรจึงจะสะท้อน กลับมา ถ้าคลื่นเรดาร์มีความยาวคลื่น 0.5 m. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... 4. สถานีวิทยุเครื่องหนึ่งส่งกระจายเสียงด้วยความถี่ 5 กิโลเฮิร์ต มีความยาวคลื่น 30 เมตร ด้วย เวลา 10 วินาที่ จงหา 4.1 ความเร็วของคลื่นมีค่าเท่าไร 4.2 ระยะทางที่คลื่นเคลื่อนที่ได้ ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...........................................................................................................................................