A Ruby Laser Beam (λ = 694

question 10

Multiple Choice

A ruby laser beam (λ = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?

• A) 500 m
• B) 250 m
• C) 120 m
• D) 1.0 km
• E) 2.7 km

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Definitions:

Autonomous Child

A child who is encouraged to make their own decisions and develop their independence and self-reliance.

Power

The capacity or ability to direct or influence the behavior of others or the course of events.

Control

Control refers to the power to influence or direct people's behavior or the course of events, or in scientific experiments, the standard conditions under which tests are made.

Exploration

The act of investigating, examining, or trying out new areas, ideas, or activities to gain knowledge or experience.