1. The smallest shift you can reliably measure on the screen is about 0.2 grid units. This shift corresponds to the precision of positions measured with the best Earth-based optical telescopes. If you cannot measure an angle smaller than this, what is the maximum distance at which a star can be located and still have a measurable parallax

Question

Tyrell Kramer

Physics

3 August, 13:59

1. The smallest shift you can reliably measure on the screen is about 0.2 grid units. This shift corresponds to the precision of positions measured with the best Earth-based optical telescopes. If you cannot measure an angle smaller than this, what is the maximum distance at which a star can be located and still have a measurable parallax

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Ainsley Buckley · Answer 1

each grid corresponding 0.1s⁻¹.

0.2grid unit = 0.2*0.1 = 0.02s⁻¹

distance of the star from telescope

d = 1/p

d = 1/0.02 = 50 par sec

1par sec = 3.26 light year

1 light year = 9.5*10¹²km

3.26ly=3.084*10¹³km

d = 50*3.084*10¹³=1.55*10¹⁵km