diagram based question
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IDENTIFICATION :
The given diagram is an astronomical telescope in normal adjustment.
WORKING:
When a parallel beam of light is incident on the objective, it forms a real, inverted and diminished image. The eyepiece is adjusted such that the image lies exactly at its focus. Final image is formed at infinity.
LABELLED DIAGRAM :
please refer to the attachment.
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Explanation:
(1) concave lens
(2) This lens is used in defect of far sightedness (hypermetropia) if we can't able to see any near things then we can say that there is defect of hypermetropia and convex lens helps to see near things.
3. By m is equal to v/u
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