Understanding Cameras, Eyes, and Optical Instruments

What part of the eye controls the amount of light that enters?

• Cornea

• Retina

• Iris

• Lens

What is the near point of the human eye?

• The point where the image forms on the retina

• The closest distance at which the eye can focus

• The point where light rays converge

• The farthest distance at which the eye can focus

How can farsightedness (hyperopia) be corrected?

• Using diverging lenses

• Using converging lenses

• Using cylindrical lenses

• Using bifocal lenses

What type of image does a simple magnifying glass produce?

• Virtual and reduced

• Real and reduced

• Virtual and enlarged

• Real and inverted

Who built a telescope that magnified objects thirty times in 1609?

• Hans Lippershey

• Isaac Newton

• Johannes Kepler

• Galileo Galilei

What type of lens is used in the eyepiece of a standard refracting telescope?

• Plano-convex lens

• Cylindrical lens

• Convex lens

• Concave lens

What is the main purpose of using mirrors in reflecting telescopes?

• To correct chromatic aberration

• To take in as much light as possible

• To increase the magnification power

• To reduce the size of the telescope

What phenomenon limits the resolution of optical instruments?

• Reflection

• Interference

• Refraction

• Diffraction