Sub-topic 1
2026 · National Preliminary
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Identifying the visible-light wavelength among electromagnetic spectrum values
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Sub-topic 2
2026 · National One-Eighth
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Image height from magnification given object and image distances
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Sub-topic 3
2024 · National One-Eighth
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The wavelength range of visible light (true/false)
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Sub-topic 4
2024 · National One-Eighth
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Riddle: radius of curvature
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Sub-topic 5
2025 · National Preliminary
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Wavelength of light from its frequency
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Sub-topic 6
2014 · National Final
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Ciliary muscles relax (not contract) to focus on distant objects (true/false)
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Sub-topic 7
2016 · National One-Eighth
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The law of reflection: angle of incidence equals angle of reflection (true/false)
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Sub-topic 8
2016 · National One-Eighth
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The law of reflection: angle of incidence equals angle of reflection (true/false)
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Sub-topic 9
2016 · National One-Eighth
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Paraxial rays parallel to the axis converge at the principal focus, midway between $C$ and the pole (true/false)
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