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Questions
Draw a ray diagram of astronomical telescope for the final image formed at infinity.
Draw a labelled diagram of an astronomical telescope when its final image lies at infinity.
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Solution
RELATED QUESTIONS
Draw a labeled ray diagram to obtain the real image formed by an astronomical telescope in normal adjustment position. Define its magnifying power.
A small telescope has an objective lens of focal length 144 cm and an eyepiece of focal length 6.0 cm. What is the magnifying power of the telescope? What is the separation between the objective and the eyepiece?
Define the term ‘resolving power of a telescope’.
A small telescope has an objective lens of focal length 140 cm and an eyepiece of focal length 5.0 cm. Find the magnifying power of the telescope for viewing distant objects when
- the telescope is in normal adjustment,
- the final image is formed at the least distance of distinct vision.
With the help of a ray diagram explain the working of a reflecting telescope.
A telescope in which the eye lens used is concave, so that the final image is erect, is popularly called a:
Which type of telescope uses a convex lens as the eyepiece, since there is no necessity for an erect image?
In an astronomical (refracting) telescope, the objective lens has:
In an astronomical refracting telescope, the final image formed by the eyepiece is:
In the working idea of a telescope's magnifying power, the beam of incident rays is inclined at an angle \[\alpha\] with the principal axis, while the emergent beam is inclined at a greater angle \[\beta\]. This produces:
