A Pulsed Laser Has an Average Output Power of 4

question 15

Multiple Choice

A pulsed laser has an average output power of 4.0 W. Each pulse consists of light at wavelength 5.0 × 10^-7 m and has a 25 ms duration. How many photons are emitted in a single pulse?

• A)1.0 × 10¹⁷
• B)2.5 × 10¹⁷
• C)3.7 × 10¹⁷
• D)5.0 × 10¹⁷
• E)7.4 × 10¹⁷

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Definitions:

Accrual Basis

An accounting method that records revenues and expenses when they are earned or incurred, regardless of when cash is exchanged.

Net Income

The total earnings of a company after subtracting all expenses, including taxes and interest, from its total revenues.

Revenue Recognized

The point at which revenue is considered earned and can be recorded in the financial statements, according to specific criteria.

Expenses Incurred

The costs that have been consumed or used up in the operation of a business, contributing to the generation of revenue.