How To Make Rainbow

I believe that all of you have ever seen a rainbow. Now, let’s make our own rainbow even when it’s not raining, as long as the sun is shining.

Before making it, please prepare the materials, such as a plastic tray or bowl, water, a piece of paper, and mirror.

Now, let’s make it step by step. I’ll guide you. First of all, fill the tray with water, then put it in a sunny place, such as windowsill or outside. After that, stand the mirror in the tray so the sun can shine through the water into the mirror. Then, hold the paper above the tray. Tilt the mirror until you see a rainbow on the paper. Nice rainbow isn’t?

Adapted from : Rachel Firth, The Usborne First Encyclopedia of Science, London, Usborn Publishing Limited, 2002

Komentar

Postingan populer dari blog ini

(Batu Golog) The Story of Golog Stone--A Folktale from West Nusa Tenggara

Formerly in the area near the river of Sawing called Padamara in West Nusa T enggara there was a poor family. The husband named Amaq Lembain , and the wife was named Inaq Lembain . Their livelihoods are agricultural laborers. Every day they walk to the village to offers s ervice to pound rice. When pound ing rice , Inaq Lembain always come with her two children. One day, when she was pounding rice, she put her children on a flat rock near the place where she was working. Surprisingly, when Inaq Lembain began pound ing , the stone that her children sat on it grew bigger . Feel like moved, the eldest son called his mother , "Mother , this rock become bigger and bigger.” U nfortunately Inaq Lembain remain do her work . Sh e just replied, "My son , just wait a minute .” And she continue pounding. That is happened many time . The flat stone was increasingly rising higher than a coconut tree. The younger child then cried uncontrol...

Baca selengkapnya

Fisiologi Rasa Lapar pada Manusia

Rasa lapar merupakan hasil dari serangkaian pengalaman fisiologis tubuh yang mengarahkan manusia atau hewan mencari makanan. Sementara itu, nafsu makan pada manusia dapat didefinisikan sebagai keinginan untuk makan dan menikmati jenis makanan tertentu. Bagi banyak orang, rasa lapar merupakan perasaan yang biasanya terfokus pada perut (lambung dan atau usus). Namun, majunya pemahaman mengenai fisiologi tubuh telah menyadarkan kita bahwa lambung dan usus hanyalah satu bagian dari sistem kompleks yang menyebabkan kita bisa merasa lapar. Rasa ingin untuk memakan makanan dapat dihasilkan oleh daerah-daerah tertentu dari otak, biasanya letaknya di hipotalamus dekat kelenjar pituitari (Gambar 1). Ketika daerah-daerah ini fungsinya terganggu, hewan dan manusia menjadi pemakan yang rakus dan mengalami obesitas. Hal ini membuktikan bahwa ada daerah khusus pada otak yang dapat menghambat atau mengurangi kei...

Baca selengkapnya

"Jangan kecewa apabila hasil yang diperoleh tidak seperti yang diharapkan. Percayalah bahwa semuanya adalah kesuksesan, bukan kegagalan. Mengapa saya punya banyak kesuksesan? Saya tahu banyak usaha yang gagal" -- Thomas Alva Edison --

Baca selengkapnya

♬My Serenity♬

Cari Blog Ini