A Beam of Light in Air Is Incident on the Surface

question 63

Multiple Choice

A beam of light in air is incident on the surface of a rectangular block of clear plastic (n = 1.49) .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)3.00E+8 m/s
• B)1.35E+8 m/s
• C)2.01E+8 m/s
• D)2.46E+8 m/s
• E)1.53E+8 m/s

---

Definitions:

Beta

A measure of a stock's volatility in relation to the overall market; a beta above 1 indicates that the stock's price tends to be more volatile than the market.

Cost of Equity

The yield a company needs to determine whether an investment satisfies its capital return criteria.

Risk-Free Rate

The expected return on an investment that carries no risk, often shown through the yield of government bonds.

Expected Stock Market Return

The predicted average return of the stock market or a specific segment of it over a specific period, considering historical trends and market conditions.