Optical Powers
Dimes Worth of Sky

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Activity 3b Dimes Worth of Sky

List the objects that were used to construct the circles from smallest to largest.  You may sketch the concentric circles of objects constructed by you and your class.

 

 

Next to each object listed above, indicate the angle subtended by that object in the circle. 

 

Define the following in terms of angular measurements:

Degree

Arcminute

Arcsecond

Explain how two objects can have the same apparent size but have very different actual sizes.

  

 

If you can measure the apparent size of an object in the night sky, what else do you need to know in order to tell how big it really is?