A Laser Emits Light of Wavelength 463 Nm During a Brief

question 31

Multiple Choice

A laser emits light of wavelength 463 nm during a brief pulse that lasts for 25 ms and has a total energy of 1.2 J.How many photons are emitted in that single pulse? (c = 3.00 × 10⁸ m/s,
H = 6.626 × 10^-34 J • s)

• A) 2.8 × 10¹⁸
• B) 6.9 × 10¹⁹
• C) 3.4 × 10¹⁹
• D) 1.1 × 10¹⁷
• E) 2.2 × 10¹⁷

---

Definitions:

Barriers To Entry

Economic, procedural, or regulatory obstacles that prevent or hinder new competitors from easily entering an industry or area of business.

Number Of Sellers

The quantity of providers or sellers in a market, affecting competition and pricing dynamics.

Monopolistic Competitor

A type of market structure where many companies sell products that are similar but not identical, allowing for competition on factors other than price.

Short Run

A period in economics during which at least one factor of production is fixed, focusing on immediate effects in production and pricing.