When the speeds are equal, which statements are true about refraction and the transmission angle?

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Multiple Choice

When the speeds are equal, which statements are true about refraction and the transmission angle?

Explanation:
When a wave crosses a boundary, refraction happens only if its speed changes in the new medium. Snell’s law links the angles to the speeds: sin(incident) / sin(transmission) = v1 / v2. If the speeds are equal, v1 = v2, so sin(incident) = sin(transmission). In the range of practical angles, that means the transmitted angle equals the incident angle, and there is no bending of the path. So there is no refraction and the transmission angle remains the same as the incident angle.

When a wave crosses a boundary, refraction happens only if its speed changes in the new medium. Snell’s law links the angles to the speeds: sin(incident) / sin(transmission) = v1 / v2. If the speeds are equal, v1 = v2, so sin(incident) = sin(transmission). In the range of practical angles, that means the transmitted angle equals the incident angle, and there is no bending of the path. So there is no refraction and the transmission angle remains the same as the incident angle.

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