An astronomical telescope consists of two thin lenses set 36 cm apart and has a magnifying power 8. calculate the focal length of the lenses.

An astronomical telescope consists of the thin lenses, 36 cm apart and has a magnifying power 8 . Calculate the focal length of lenses. Two stars have an actual separation of one minute of arc. Find the angle of separation as seen through the telescope.

An astronomical telescope of magnifying power 10 consists of two thin lenses 55 cm apart. Calculate the focal length of the lenses.

An astronomical telescope of magnifying power 7 consists of two thin lenses 40 cm apart, in normal adjustment. Calculate the focal lengths of the lenses.

An astronomical telescope having a magnifying power of 8 consists of two thin lenses 45 cm apart. Find the focal length of the lenses.

Astronomial telescope has two lenses of focal power 0.5D and 20D. Then its magnifying power is:

An astronomical telescope consists of two convex lenses of focal lengths 20 cm and 4 cm. For the nomal adjustment of the telescope, what is the angular magnification produced by the telescope ?

An astronomical telescope uses lenses of power 10 D and 1 D . What is its magnifying power in normal adjustment ?

Focal length of combination of two thin lenses is 1 m. Calculate the power of one lens if the focal length of other lens is 30 cm.

If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting, calculate the focal length of objective

An astronomical telescope has a magnifying power 10. The focal length of the eye piece is 20 cm. the focal length of the objective is -