Answer: to direct light rays to a focal point
Explanation:
A reflecting telescope uses curved mirror as primary and a plane mirror placed at an angle as secondary. A curved mirror is used as primary because this mirror collects the light from distant celestial object and converges its light at focus where the plane mirror is kept at an angle so that the reflected light is received by the eyepiece.
It is used as a curved primary mirror in a telescope because to direct light rays to a focal point.
For the construction of a telescope, the physicist Galileo used a lens of the converging type and a lens of the diverging type. In his telescope, the first lens, called the objective, formed a real image of the object in question.
A reflecting telescope uses curved mirror as primary because this mirror collects the light from distant celestial object and converges its light at focus where the plane mirror is kept at an angle so that the reflected light is received by the eyepiece.
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