A Ray of Light Is Normally Incident on Face Ab $\alpha$

question 55

Multiple Choice

A ray of light is normally incident on face ab of a plastic prism with an index of refraction n = 1.20 as shown.
-Determine the largest value of the angle $\alpha$ so that the ray is totally reflected at the face ac if the prism is immersed in a liquid with refractive index 1.12.

• A)21°
• B)34°
• C)69°
• D)78°
• E)Total internal reflection will not occur for any value of \(\alpha\).

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Definitions:

Potassium Channels

Pores in cell membranes that allow potassium ions to pass through, regulating cell function.

Sodium Channels

Protein-based channels found in cell membranes that allow sodium ions to flow in and out, critical for generating and transmitting electrical signals.

Membrane Potential

The electrical potential difference across a cell's plasma membrane, crucial for the conduction of impulses in muscle and nerve cells.

Channels

Structures that form pores in the membranes of cells and organelles, allowing the selective passage of ions or molecules across the membrane and thus contributing to vital physiological processes.