Human Eye and Light Phenomena Quiz

Which part of the human eye controls the amount of light entering the eye?

• Retina

• Lens

• Cornea

• Iris

The image formed on the retina is:

• Erect and virtual

• Erect and real

• Inverted and real

• Inverted and virtual

The part of the eye where light is focused to form an image is called:

• Cornea

• Retina

• Pupil

• Iris

The eye defect in which distant objects are seen clearly but nearby objects appear blurred is:

• Myopia

• Hypermetropia

• Astigmatism

• Presbyopia

Which of the following phenomenon is responsible for the blue color of the sky?

• Dispersion

• Scattering

• Refraction

• Reflection

The least distance of distinct vision for a normal human eye is:

• 15 cm

• 25 cm

• 35 cm

• 50 cm

Which type of lens is used to correct myopia?

• Convex lens

• Concave lens

• Cylindrical lens

• Bifocal lens

Which phenomenon is responsible for the twinkling of stars?

• Dispersion

• Scattering

• Refraction

• Reflection

The change in the focal length of the eye lens is caused by:

• Cornea

• Iris

• Ciliary muscles

• Retina

Which of the following is a common defect of vision in old age?

• Myopia

• Hypermetropia

• Astigmatism

• Presbyopia