Light and Human Eye

6. The phenomenon responsible for the formation of a rainbow is:

a) Reflection

b) Refraction

c) Diffraction

d) Dispersion

7. The unit of measurement for the refractive index is:

a) Ohms

b) Hertz

c) Pascal

d) None of the above

8. The human eye can perceive colors due to the presence of:

a) Rod cells

b) Cone cells

c) Ganglion cells

d) Bipolar cells

9. The part of the eye responsible for focusing light onto the retina is the:

a) Cornea

b) Iris

c) Pupil

d) Lens

10. The condition in which the lens of the eye becomes cloudy, leading to blurred vision, is called:

a) Astigmatism

b) Myopia

c) Hyperopia

d) Cataract