
Tema 5 ( sifat Cahaya)
Presentation
•
Science
•
4th Grade
•
Hard
Dewi Maharani
Used 2+ times
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7 Slides • 0 Questions
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by Dewi Maharani
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Cahaya merambat lurus
Cahaya menembus benda bening
Cahaya dapat dipantulkan
Cahaya dapat dibiaskan
Cahaya dapat diuraikan
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Contohnya : cahaya matahari yang masuk dari celah genting atau ventilasi akan tampak berupa garis lurus, lampu senter, lampu motor
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Cahaya dapat menembus benda bening. Hal ini karena benda bening mampu meneruskan cahaya.
Contoh benda bening : kaca, mika, plastic bening, air jernih, botol bening
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Pembiasan cahaya terjadi ketika arah rambat cahaya dibelokkan.
Contoh: kolam yang airnya jernih terlihat dangkal dan pensil yang terlihat patah saat dimasukkan ke dalam gelas bening berisi air
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Pemantulan ada 2 yaitu pemantulan teratur, pemantulan baur ( difus)
Pemantulan teratur terjadi jika mengenai benda rata, licin dan mengkilap, contoh cermin saat kita bercermin
Pemantulan baur terjadi jika cahaya mengenai benda yang permukaannya tidak rata, contoh yaitu pada tanah, tembok, bat
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Prinsip penguraian cahaya adalah penguraian cahaya putih menjadi cahaya dengan warna yang berbeda.
contoh : pelangi
by Dewi Maharani
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