ACT Science Practice Question #1534 (Hard (33)) | Test Citadel
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ACT Science Difficulty: Hard (33)

Digital ACT Science Practice Question #1534

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

Light travels through a core of index n_core = 1.50 surrounded by cladding of index n_clad: - Cladding A (n = 1.45): Critical angle = 75.2° - Cladding B (n = 1.40): Critical angle = 68.9° - Cladding C (n = 1.30): Critical angle = 60.1° To achieve total internal reflection over the widest range of incident angles (lowest critical angle), fiber optic designers should select:
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Lowest critical angle = Cladding C (60.1°).

Masterclass Solution & Distractor Trap Analysis

Sin(theta_c) = n_clad / n_core. Lower cladding index yields a lower critical angle (60.1° for Cladding C), allowing reflection over a wider range of angles....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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