Page 40 - Softcopy for Teachers buku kerja + nota Nilam Publications

MODUL • Fizik TINGKATAN 5

Cahaya nampak Matahari, objek panas, i. Penglihatan, fotosintesis Terlalu banyak cahaya
Visible light nyalaan mentol, tiub dalam tumbuhan menyebabkan kerosakan
berpendarfluor Sight, photosynthesis in plants retina
Sun, hot objects, light bulbs, ii. Fotografi / Photography To much light can damage
fluorescent tubes the retina

Sinar ultraungu Objek yang sangat panas, i. Membunuh mikrob, mengesan wang Terlalu tinggi dos UV
Ultraviolet radiation matahari, lampu wap merkuri kertas palsu / Kill microbes, detecting yang boleh merosakkan
Very hot objects, the Sun, forged bank notes retina, menyebabkan
mercury vapour lamps ii. Pensterilan untuk memusnahkan kanser kulit
kuman / Sterilisation to destroy germs Large doses of UV which
iii. Penghasilan vitamin D dalam kulit can damage retina, causes
skin cancer
Production of vitamin D in skin
Sinar-X Tiub sinar-X i. Radioterapi, radiografi UNIT 1
X-rays tubes Radiotherapy, radiography
X-rays
ii. Sistem kawalan / Security system
iii. • Untuk mengesan retakan pada Kerosakan sel; kanser
logam. / To detect cracks in metal. Cell damage; cancer
• Memeriksa barang di lapangan
terbang.
Checking of luggage at airports.
Sinar gama Bahan radioaktif i. Rawatan kanser Kerosakan sel; kanser
Radioactive substances Cancer treatment dan mutasi
Gamma rays ii. Pensterilan peralatan Cell damage, cancer and
Sterilisation of equipment mutations
iii. Kawalan perosak dalam pertanian
Pest control in agriculture
iv. Untuk mengesan kebocoran paip
dalam tanah
To detect leakages in underground pipes

L atihan Pengukuhan / Enrichment Exercise

1 Graf yang manakah menunjukkan hubungan antara
frekuensi, f, dengan tempoh, T, bagi suatu gelombang? Gelombang tuju Concrete wall
Incident wave
Which graph shows the relationship between frequency, f and
period, T, of a wave?
A f C f
Gelombang pantulan
Reflected wave

Rajah 2 / Diagram 2
0 T 0 T Perbandingan manakah yang betul tentang pantulan
B f D f gelombang bunyi dan gelombang tuju?
Which comparison is correct about the reflected sound wave
and the incident sound wave?
A Panjang gelombang bagi gelombang tuju lebih
pendek daripada gelombang pantulan.
0 T 0 T The wavelength of the incident wave is shorter than the
reflected wave.
2 Rajah 2 menunjukkan gelombang bunyi dipantulkan pada B Laju gelombang tuju dan gelombang pantulan adalah
dinding konkrit. / Diagram 2 shows a sound wave reflected sama. / The speed of the incident wave and the reflected
on a concrete wall. wave is the same.

41 © Nilam Publication Sdn. Bhd.