Refraction by Plane Surfaces: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Refraction by Plane Surfaces. Understanding the underlying formula is key to arriving at the correct answer below:

When light enters a new medium, its speed and wavelength change, while frequency remains constant. Light deviates upon refraction unless it strikes normally. Both A and R are true, but R describes a characteristic of refraction, not the cause of wavelength change.