Matahari ialah sumber cahaya semula jadi. Lampu dan nyalaan api juga menghasilkan cahaya; cahaya yang mencukupi memudahkan aktiviti harian.
Langkah 1
Sumber cahaya menerangi kawasan
Matahari ialah sumber cahaya semula jadi. Lampu dan nyalaan api juga menghasilkan cahaya; cahaya yang mencukupi memudahkan aktiviti harian.
matahari + lampu + api → cahaya
sumber cahaya menerangi kawasan = 光源照亮地方 太阳是天然光源；灯和火也会发光。足够的光让日常活动更容易，例如做功课和煮饭。 例子：夜市摊位挂起灯泡，顾客才看得清食物和价钱。 注意：天然和人造的都算光源，不要以为只有太阳才算。
sumber cahaya menerangi kawasan = light sources light up an area The Sun is a natural light source, while lamps and flames also produce light. Enough light makes daily activities such as homework and cooking easier. Example: Night market stalls hang bulbs so customers can see the food and prices. Watch out: Natural and man-made sources both count; do not think only the Sun is a light source.
Langkah 2
Bayang-bayang terbentuk apabila cahaya dihalang
Sumber cahaya, objek dan skrin perlu disusun dengan betul. Bayang-bayang terbentuk di belakang objek apabila objek menghalang cahaya.
bayang-bayang terbentuk = shadows form The light source, object and screen must be set up properly. When the object blocks light, a shadow forms behind it. Example: At noon, the cool shade under a tree is the shadow made where leaves block the sunlight. Watch out: The screen must be behind the object to catch the shadow; placed behind the lamp, it shows nothing.
Langkah 3
Jenis bahan mempengaruhi kejelasan
Bahan legap menghasilkan bayang-bayang jelas, bahan lut cahaya menghasilkan bayang-bayang kurang jelas, manakala bahan lut sinar mungkin tidak menghasilkan bayang-bayang yang dapat dilihat.
legap: jelas | lut cahaya: kurang jelas | lut sinar: sangat kabur / tiada
jenis bahan dan kejelasan = 材料与影子的清楚度 不透明材料的影子清楚；半透明的较淡；透明的很模糊，甚至看不见。挡住的光越多，影子越清楚。 例子：同一盏灯下，木尺的影子最黑，描图纸次之，透明尺几乎没有。 注意：要分清 lut cahaya（半透明）和 lut sinar（透明），两个名字很像。
jenis bahan dan kejelasan = material type and clearness Opaque materials make clear shadows, translucent ones make paler shadows, and transparent ones make very faint or no visible shadows. The more light blocked, the clearer the shadow. Example: Under one lamp, a wooden ruler gives the darkest shadow, tracing paper a lighter one, and a clear ruler almost none. Watch out: Lut cahaya and lut sinar sound alike but mean translucent and transparent.
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Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Yang manakah kumpulan sumber cahaya?
kumpulan sumber cahaya = 一组光源 题目要找“整组都是光源”的选项。逐一问每样东西：它自己会发光吗？还是只会反光，或根本不发光？一组里每一样都要通过检查。 例子：萤火虫、电筒和烟花都自己发光。 注意：亮晶晶、会反光的东西最容易被当成光源。
kumpulan sumber cahaya = a group of light sources You need a group where every item is a light source. Ask of each thing: does it make its own light, only reflect light, or give no light at all? Every item must pass. Example: Fireflies, torches and fireworks all make their own light. Watch out: Shiny things that reflect light are the easiest to mistake for light sources.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Mengapakah aktiviti harian lebih mudah dalam keadaan terang?
aktiviti dalam keadaan terang = 在亮处做事 题目问“为什么”亮的时候做事比较容易。想一想光真正改变了什么，再检查每个选项在现实中是否真的会发生。 例子：穿针时坐到窗边，针孔就比较好找。 注意：先找出题目的关键字 terang 和 mudah，再判断两者的关系。
aktiviti dalam keadaan terang = activities in bright conditions The question asks why daily tasks are easier when it is bright. Think about what light really changes and test whether each choice could truly happen in real life. Example: Threading a needle is easier when you sit by a sunny window. Watch out: Find the key words terang and mudah first, then work out how the two are linked.
Ringkasan
Syabas!
Kamu telah mengulang kaji bab Terang DAN Gelap.
Ingat: sumber cahaya menerangi kawasan; bayang-bayang terbentuk apabila cahaya dihalang; jenis bahan mempengaruhi kejelasan.
