Saved Bookmarks
| 1. |
A small telescopehas an objective lens of focal length 125 cm and aneyepiece of focal length 2 cm. What isthe magnification of the telescope? What is the separation between the objective and eyepiece? Two stars separatedby 1' will appearat whatseparation when viewed through the telescope? |
|
Answer» Solution :`f_(o)=125cm,f_(e)=2cm,m=?L=?,theta=?` Equation for magniification of telescope, `m = (f_(o))/(f_(e))` Substituting, `m = (125)/(2) = 62.5` Equation for approximate length of telescope, `L = f_(o) + f_(e)` Substituting, `L=125+2=127cm=1.27m` Equationforangular magnification, `m=(theta_(i))/(theta_(o))` REWRITING, `theta = m xx theta_(o)` Substituting, `theta_(i)=62.5xx1.=62.5.=(62.5)/(60)=1.04.` |
|