An astronomical telescope has an objective of focal length 200 cm and an eye-piece of focal length 10 cm. An observer adjusts the distance of the eye piece from the objective to obtain the image of the sunon a screen 40 cm behind the eye-piece. The diameterof the sun's image is 60 cm. Find the diameter of thesun. The average earth sun distance is 1.5 x 10 m.

An astronomical telescope has an objective of focal length 200 cm and

1.	An astronomical telescope has an objective of focal length 200 cm and an eye-piece of focal length 10 cm. An observer adjusts the distance of the eye piece from the objective to obtain the image of the sunon a screen 40 cm behind the eye-piece. The diameterof the sun's image is 60 cm. Find the diameter of thesun. The average earth sun distance is 1.5 x 10 m.
Answer» An astronomical telescope has an objective of focal length 200 cm and an eye-piece of focal length 10 cm. An observer adjusts the distance of the eye piece from the objective to obtain the image of the sun on a screen 40 cm behind the eye-piece. The diameter of the sun's image is 60 cm. Find the diameter of the sun. The average earth sun distance is 1.5 x 10 m.