How Far Away Can Two Point Sources of Light of Wavelength

question 71

Multiple Choice

How far away can two point sources of light of wavelength 500 nm be, if they are just resolvable in a telescope with an aperture width of 1.5 cm?

• A) 25 km
• B) 12 km
• C) 90 m
• D) 12 m
• E) more information is needed

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Definitions:

Electrons

Subatomic particles with a negative electric charge, found in all atoms and acting as the primary carrier of electricity in solids.

Lewis Structure

A representation of molecules showing all the valence electrons and highlighting the bonding between atoms.

Chloromethane

A colorless and highly volatile compound, used as a refrigerant, propellant, and in the synthesis of other chemicals.

Lone Pairs

Pairs of valence electrons not involved in bonding, but which occupy space around an atom, influencing molecular shape and reactivity.