A Ruby Laser Beam (λ = 694

question 6

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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Catering Department

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A department or function within a business to which costs are charged for accounting purposes, but does not directly generate revenue.