SOLUTIONS JUNE 2026.pdf

= 1/5 = 0.2 OR = v / u = 40 / 200 = 1/5 = 0.2 a)They made convex (diverging) mirrors SOLUTIONS 2026 LIGHT AND WAVES ITEM 1: 𝑚𝑎𝑔𝑛𝑖𝑓𝑖𝑐𝑎𝑡𝑖𝑜𝑛 = 𝑕𝑖 ho = 150 cm u = 200 cm f = 50 cm Let 1 cm represent 25 cm. (Graph paper) = 30 / 150 𝑕𝑜 o 1 - A ray of light from the object O initially parallel to the principal axis is reflected diverging and it appear as if it is from the principal focus F. - A ray from the object O through the centre of curvature C is reflected along the same path. - The point where the above two rays appears to intersect is where the image I is formed as shown above. b) - Road signs with reflecting colours show the bent road ahead. - Road signs with glass reflectors like road studs and glasses with reflectors on road barriers/guard rails. - Convex mirror to work as traffic mirrors. - Using reflecting colours to write words like "slow down" or zig-zag signs at points near the black spot. (b) Rain and foggy conditionsbring about a lot of water droplets being suspended in space which scatter the parallel beam of light from the headlamps in all directions giving a glare effect that reflects light back into the driver's eyes instead of illuminating the road ahead. At night, the lack of natural light leaves only the artificial bulbs to illuminate a narrow section directly in front of the car. (c) The sound from the presentersis distorted and not clear due to reverberation of sound waves. This is where the original sound interferes with the echo to produce a prolonged so