Jawapan Buku Teks Fizik Tingkatan 4 Kssm Aktiviti 13 Top Full May 2026

Diamond has a high refractive index (2.42) and a low critical angle (24.4°). Light entering diamond undergoes multiple total internal reflections before exiting, creating a sparkling effect. Glass has a lower refractive index (~1.5) and higher critical angle, so less total internal reflection occurs. Section D: Lenses (Aktiviti 13.4) Question: A convex lens has a focal length of 10 cm. An object of height 2 cm is placed 15 cm from the lens. Find: a) Image distance b) Magnification c) Image height

Image height = m × object height = 2 × 2 cm = Diamond has a high refractive index (2

1/10 = 1/15 + 1/v 1/v = 1/10 – 1/15 = (3 – 2)/30 = 1/30 v = 30 cm (Image distance) Section D: Lenses (Aktiviti 13

Magnification, m = v/u = 30/15 =