Optical Instruments and Vision Defects Quiz

What type of lenses are used to correct both myopia and hypermetropia?

• Concave lenses

• Convex lenses

• Cylindrical lenses

• Bifocal lenses

What defect of vision is characterized by the inability to see parallel and horizontal lines clearly?

• Presbyopia

• Astigmatism

• Hypermetropia

• Myopia

What type of microscope has a convex lens of short focal length?

• Compound microscope

• Simple microscope

• Travelling microscope

• Telescope

What is the magnification power of a compound microscope compared to a simple microscope?

• 5 times more

• 50 to 200 times more

• 100 times less

• 10 times more

What is the least count of a travelling microscope?

• 0.001 mm

• 1 mm

• 0.1 mm

• 0.01 mm

Who invented the first telescope?

• Galileo

• Johann Lippershey

• Isaac Newton

• Kepler

What is the main difference between astronomical and terrestrial telescopes?

• Size of the telescope

• Type of lenses used

• Cost of the telescope

• Erecting the final image

What type of image does a terrestrial telescope provide?

• Virtual image

• Real image

• Erect image

• Inverted image

What is one advantage of using telescopes?

• Not easily portable

• Elaborate view of celestial bodies

• Frequent maintenance needed

• Requires high intensity of light

What type of lenses are used in a compound microscope?

• Concave lenses

• Biconvex lenses

• Cylindrical lenses

• Flat lenses