Page 7 - Modul A+ Fizik Tg 5_Pan Asia Publications

B Kuantum tenaga/ Quantum of energy

Lengkapkan peta minda di bawah. TP 3
Complete the mind map below.

Nyatakan teori Max Planck Tuliskan persamaan untuk mengira
berkenaan kuantum tenaga kuantum tenaga
State Max Planck’s theory of Quantum Write an equation to calculate the
Energy Kuantum Tenaga quantum of energy
Quantum of Energy
hc
Max Planck menyatakan bahawa E = hf atau/or E = —–
λ
tenaga sinaran gelombang
elektromagnet adalah tidak selanjar
tetapi dalam bentuk kuantum. Perbandingan/ Comparison
Max Planck stated that energy of Teori Klasik Teori Kuantum Planck
Classical Theory Planck’s Quantum Theory
electromagnetic radiation is not
continuous but in terms of quantum. Selanjar Diskrit atau paket
Continuously Discrete or packet

C Teori foton/ Theory of photon

Isi tempat kosong dan lukis garis bagi graf di bawah. TP 3
Fill in the blanks and draw line for graphs below.

1. Foton adalah satu bungkusan diskrit tenaga (atau kuanta ) bagi suatu sinaran

elektromagnet./ A photon is a discrete bundle of energy (or quantum ) of electromagnetic beam.

2. Tenaga foton berkadar terus kepada frekuensi gelombang elektromagnet.
frequency
of the electromagnetic waves.
Photon energy is directly proportional to the
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hc
E = —–
3. Rumus tenaga foton/ Formulae energy of photon, E = hf atau/ or λ
E E

f λ

Uji Kendiri 7.1

Soalan/ Questions Jawapan/ Answer

hc
1. (a) Hitungkan tenaga foton bagi gelombang (a) E = —–
elektromagnet ultra-ungu dengan panjang λ
(6.63 × 10 )(3.0 × 10 )
gelombangnya, λ = 390 nm. E = ——————————
–34
8
Calculate the photon energy of ultra-violet 390 × 10 –9
electromagnetic waves with wavelength, E = 5.1 × 10 J
–19
λ = 390 nm.
1
(b) E ∝ —
(b) Nyatakan dan terangkan sebarang perubahan λ
kepada tenaga foton jika panjang gelombang E berkadar songsang dengan panjang gelombang, λ.
elektromagnetik bertambah? Jika λ bertambah, E akan berkurang.
State and explain any changes to photon energy if E is inversely proportional to wavelength, λ. If λ increases,
wave length of electromagnetic wave increased? E will decrease.

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