
Fenomena Kuantum
Authored by Shannon Jovanna
Physics
12th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika sinar ungu dengan frekuensi 1016 Hz dijatuhkan pada permukaan logam yang mempunyai fungsi kerja 3/5 kali energi sinar ungu, besar energi kinetik elektron adalah ... joule.
2,65 × 10-18
1,87 × 10-18
2,78 × 10-18
1,64 × 10-18
2,53 × 10-18
Answer explanation
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Teori Planck tentang radiasi benda hitam menyatakan bahwa energi yang dipancarkan atau diserap oleh suatu benda hitam bersifat …
Kontinu dalam bentuk gelombang elektromagnetik
Kontinu dalam bentuk partikel
Terkuantisasi dalam bentuk paket-paket diskrit energi
Terdistribusi merata pada semua panjang gelombang
Tidak bergantung pada suhu benda hitam
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sebuah benda dengan luas permukaan 500 cm2 bersuhu 727ºC. Emisivitas benda sebesar 0,5. Tentukan daya radiasi pada benda tersebut!
1532,1 Watt
1340,2 Watt
1457,8 Watt
1200 Watt
1417,5 Watt
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Radiasi bintang X pada intensitas maksimum terdeteksi pada panjang gelombang 400 nm. Jika tetapan pergeseran Wien adalah 2,9 x 10-3 mK maka suhu permukaan bintang X tersebut adalah …
6789,5 K
7250 K
6150 K
7000 K
7321,2 K
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Keping logam memiliki energi ambang 1 eV disinari dengan cahaya monokromatis panjang gelombang 5.000 Å hingga elektron meninggalkan permukaan logam. Diketahui h=6,63×10-34 Js dan kecepatan cahaya 3×108 m.s-1, maka energi kinetik elektron yang lepas adalah...
1,76 × 10-19 J
3,5 × 10-19 J
0,16 × 10-19 J
2,38 × 10-19 J
0,2 × 10-19 J
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