Refractor telescopes use .
A. mirrors
B. lenses
C. Both mirrors and lenses
D. neither mirrors or lenses

lenses

Explanation:

Every fracture telescope uses a glass lens as its objective the glass lens is at the front of the telescope and light is bend (refracted) as it passes through the lens.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.