All about telescopes refractors reflectors and more a telescope is an optical instrument used to magnify and enhance the view of faraway objects be they astronomical or terrestrial most telescopes fall into one of two main categories refractor or reflector also available are schmidt cassegrain telescopes a combination of reflector and . A telescope is an optical instrument used to see distant objects it is nothing but the arrangement of different lenses through which the light from the distant object collected and magnified telescopes can be used for terrestrial viewing to watch planets stars celestial objects etc
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