What special object is in a pair of binoculars?

What special object is in a pair of binoculars?

• A. Two prisms which serve as plane mirrors
• B. A parabolic mirror pair
• C. A single eyepiece lens
• D. A light filter

Answer: (A)

In binoculars the special component is a pair of prisms, one in each tube. These prisms act like mirrors to bend and redirect the light path so the image that comes from the objective lenses—usually upside down—is rotated to appear upright to your eye. Having two prisms also helps fold the light path, making the instrument more compact. The other options don’t fit because there isn’t a parabolic mirror pair, there isn’t just a single eyepiece lens defined as the special object, and there isn’t a regular light filter doing the viewing job.

In binoculars the special component is a pair of prisms, one in each tube. These prisms act like mirrors to bend and redirect the light path so the image that comes from the objective lenses—usually upside down—is rotated to appear upright to your eye. Having two prisms also helps fold the light path, making the instrument more compact. The other options don’t fit because there isn’t a parabolic mirror pair, there isn’t just a single eyepiece lens defined as the special object, and there isn’t a regular light filter doing the viewing job.