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Secondary 1/2 Level Reflection Law of reflection states that the angle of incidence = the angle of reflection the incident ray, the normal line and the reflection ray lie in the same plane. Taken from: https://physicsigcse.files.wordpress.com/2016/05/law20of20reflection.gif?w=474&h=228 Refraction Refraction takes place when light travels from one medium into another optical medium of different refractive index. Taken … Read more

Tips to do well for this chapter Chemical formula is always represented by a capital letter. E.g Ca is calcium and not Carbon and an atom called “a” . If we want that, it will be written as CA. Familiarize yourself with the periodic table In balancing chemical equation, it is like a tug of … Read more