A Beam of Light in Air Is Incident on the Surface

question 17

Multiple Choice

A beam of light in air is incident on the surface of a rectangular block of clear plastic (n = 1.64) .If the velocity of the beam before it enters the plastic is 3.00 × 10⁸ m/s,what is its velocity inside the block?

• A) 3.00 × 10⁸ m/s
• B) 1.12 × 10⁸ m/s
• C) 1.83 × 10⁸ m/s
• D) 2.34 × 10⁸ m/s
• E) ​1.08 × 10⁸ m/s

---

Definitions:

Dosing

Dosing refers to the controlled administration of a drug or medication in specified amounts and at specified intervals.

Bloodstream

The system of blood flowing throughout the body, delivering oxygen and nutrients while removing waste products.

Healthcare Professional

An individual who provides preventive, curative, promotional, or rehabilitative health care services in a systematic way to people, families, or communities.

Natural Drugs

are medicinal substances derived from natural sources, such as plants, animals, or minerals, used in traditional or modern medicine.