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Microscopes And Telescopes
Question
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(i) Define Resolving Power of a simple astronomical telescope.

(ii) State one advantage of a reflecting telescope over refracting telescope.

Answer

(i) Resolving power of a telescope is its ability to see two very closely objects just separate,

(ii) Advantage of reflecting telescope over refracting telescope is, there is no loss of light in case of reflection, image produced by a reflecting telescope is much brighter than that produced by a refracting telescope.

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Some More Questions From Microscopes And Telescopes Chapter

Draw a labelled diagram of an image formed by a compound microscope, with the image at least distance of distinct vision. Write any one expression for its magnifying power.

(i) Define Resolving Power of a simple astronomical telescope.

(ii) State one advantage of a reflecting telescope over refracting telescope.

Draw a labelled diagram of an image formed by a compound microscope with image formed at least distance of distinct vision.

State two important conclusions that can be drawn from Millikan’s oil drop experiment to determine the charge of an electron. 

(i)Explain the statement: “Angular magnification of a compound microscope in normal use is 30”.

(ii) State how the resolving power of an astronomical telescope can be increased. 

 Draw a labelled Ray diagram of an image of a distant object formed by a refracting astronomical telescope in normal adjustment. Write (do not derive) an expression for its magnifying power.