n = 1 / sin c n = 1 / sin 24.4° n = 1 / 0.413 = 2.42
n = speed of light in vacuum / speed of light in medium n = (3.0 × 10⁸) / (2.0 × 10⁸) = 1.5 n = 1 / sin c n = 1 / sin 24
1/10 = 1/15 + 1/v 1/v = 1/10 – 1/15 = (3 – 2)/30 = 1/30 v = 30 cm (Image distance) A light ray travels from water (n = 1
Real, inverted, magnified. Section E: Optical Instruments (Aktiviti 13.5 – Periscope) Question: Draw a labelled diagram of a periscope using two prisms. Explain how total internal reflection helps in image formation. with your classmates who are also searching for
A light ray travels from water (n = 1.33) into air. The angle of incidence in water is 35°. Calculate the angle of refraction in air.
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Using Snell’s Law: n₁ sin i = n₂ sin r 1.33 × sin 35° = 1.00 × sin r 1.33 × 0.574 = sin r sin r = 0.763 r = sin⁻¹ (0.763) = 49.8° Section C: Total Internal Reflection (Aktiviti 13.3) Question: The critical angle for diamond is 24.4°. Calculate the refractive index of diamond.