A ray of light enters an equilateral prism made of material with n = 1.45 at an angle of incidence θ. The internally refracted ray is parallel to the base of the prism. What is the angle of refraction for the ray leaving the prism? 
Definitions:
Antigens
Substances that the immune system recognizes as foreign and against which it mounts an immune response.
General Adaptation Syndrome
A theoretical model describing the body's stress response in three stages: alarm, resistance, and exhaustion.
Alarm Reaction Stage
The initial phase of the stress response, where the body reacts to a stressor with a fight or flight response, activating various physiological changes.
Exhaustion Stage
The final phase of the general adaptation syndrome, characterized by the body's depletion of resources in response to prolonged stress, potentially leading to stress-related disorders.
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