Answer:
c. objective
Explanation:
The refracting telescope works with refraction and light passes through a lens to form the image. This instrument has an objective lens that captures light from objects and forms the image in focus. Just behind is a second lens called the eyepiece. The eyepiece works like a magnifying glass, magnifying the image formed by the lens. The refracting telescope, also known as a spotting scope, was perfected by astronomer and physicist Galileo Galilei in the year 1610. The weight of the objective lens limits the size of refractive telescopes.
