An astronomicla telescope has an objective of focal length 20 cm and an eyepiece of focal length 4.0 cm. The telescope is focussed to see an object 10 cmfrom the objective.the fnal imae is formed at infinity.Find the length of the tube and the angular magnification produced by the telescope.

An astronomical telescope has an objective of focal length 20 cm and an eyepiece of focal length 4.0 cm. The telescope is focused to see an object 10 Km from the objective .The final image is formed at infinity. Find the length of the tube and the angular magnification produced by the telescope.

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm.

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm.

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Then

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Then

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm .

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm .

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm .Then the magnification