Two Parallel Glass Plates of Index of Refraction N Are

question 175

Multiple Choice

Two parallel glass plates of index of refraction n are separated by an air film of thickness d. Light of wavelength λ in air, normally incident on the plates, is intensified on reflection when, for some integer m,

• A) 2d = mλ.
• B) 2d = mλ/n.
• C) 2d = mnλ.
• D) 2d = m + 1/2)λ.
• E) 2nd = mλ /2.

---

Definitions:

After-Tax Earnings

The amount of net income a firm has after all taxes have been paid, representing the company's profitability.

Retained Earnings

Profits that a company keeps or retains rather than distributing to shareholders as dividends, often used for reinvestment.

Taxable Income

The amount of income subject to tax, after deductions and exemptions, as determined by tax laws.

Quarterly Dividends

These are dividends paid by a corporation to its shareholders every three months, or four times a year, representing a portion of the company's earnings.