Exam 1 Flashcards by Keyaan Chughtai | Brainscape

Q

Light Gathering Power of a lens

A

power is proportional to the area collecting light
P α πr^2

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Q

Kepler’s Third Law

A

4π^2/P^2 = GM/R^3

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Q

Kepler’s Third Law Derivation

A

N2 for 2 stars (binary stars)
F is gravitational force
a is centripetal acceleration
Add the 2 equations together
For CF - r is orbital distance
For GF - R is distance between 2 stars
So R = r1 +r2

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