A Light Beam from a 2

question 15

Multiple Choice

A light beam from a 2.1-mW He-Ne laser has a wavelength of 633 nm. How many photons does the laser emit in one second? (h = 6.626 × 10^-34 J ∙ s, c = 3.00 × 10⁸ m/s)

• A) 6.7 × 10¹⁵
• B) 8.8 × 10¹⁵
• C) 1.1 × 10¹⁶
• D) 1.3 × 10¹⁶

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Definitions:

Social Ties

represent the connections or relationships between individuals or groups that affect social behavior and contribute to a sense of community.

Infectious Disease

Diseases caused by pathogens such as bacteria, viruses, fungi, or parasites that can be spread, directly or indirectly, from one person to another.

Social Contacts

Interactions between individuals in a society which form the basis of social relationships and structures.

Network Analysis

A methodological approach in social science that studies the structures of relationships between actors, such as individuals or organizations, through the use of networks and graph theories.