Why an astronomical telescope uses an objective of large aperture

1. A.
   greater magnification.
2. B.
   greater resolution.
3. C.
   reducing lens aberration.
4. D.
   ease of manufacture.

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1. A.
   have high resolution.
2. B.
   have low dispersion.
3. C.
   increase the span of observation.
4. D.
   have large wavelength.

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1. A.
   greater resolution.
2. B.
   reducing lens aberration.
3. C.
   greater magnification.
4. D.
   ease of manufacture.

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1. A.
   increasing the diameter of objective.
2. B.
   decreasing the diameter of the objective
3. C.
   increasing the distance between the objects which have to be seen through the telescope.
4. D.
   decreasing the the distance between the objects which have to be seen through the telescope.

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