Beta, just remember your lines: one ray goes straight through the center, the other bends at the lens and meets it. Draw neat lines and label everything, examiners love that. But listen, the real trick is to practice under the tube light like we do after my oil jars are sealed—your diagram must be clear even in dim light, like our kitchen, where we check orders. My grandson’s cricket ball once hit his slate and broke it, so he learned to draw firm lines. Do that.
#exams#study
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