The image formed by the telescope in normal adjustment position is at

(a) Draw a labelled ray diagram to obtain the real image formed by an astronomical telescope is normal adjustment position. Define its magnifying power. (b) You are given three lenses of power 0.5 D , 4D and 10D to design a telescope. (i) Which lenses should be used as objective and eyepiece? Justify your answer. (ii) Why is the aperture of the objective preferred to be large ?

The magnifying power an astronomical telescope in the normal adjustment position is 100. The distance between the objective and the eyepiece is 101 cm. calculate the focal length of the objective and the eyepiece.

The magnifying power of an astronomical telescope in the normal adjustment position is 20.If the length of the telescope is 105 cm in this adujustment ,find the focal lengths of the two lenses.

The magnifying power of a telescope in normal adjustment is 20 , and the focal length of the eyepiece is 5xx10^(-2) m. what is the magnifying power obtained when the system is adjusted so that the final image of a distant object is formed 25xx10^(-2) m away from the eyepiece?