Human Eye and the Colourful World-MCQ

1.   The image formed by retina of human eye is

       a.  Virtual and erect

       b.  Real and inverted

       c.  Virtual and inverted

       d.  Real and erect

2.   The change in the focal length of human eye is caused due to

       a.  Ciliary muscles

       b.  Pupil

       c.  Cornea

       d.  Iris

3.   The least distance of distinct vision for a young adult with normal vision is

       a.  25 m

       b.  20 m

       c.  25 cm

       d.  20 cm

4.   The persistence of vision for human eye is

       a.  1/10th of a second

       b.  1/16th of a second

       c.  1/6th of the second

       d.  1/18th of a second

5.   The light sensitive cell present on retina and is sensitive to the intensity of light is:

       a.  Cones

       b.  Rods

       c.  Both rods and cones

       d.  None of these

6.   The phenomena of light responsible for the working of the human eye is

       a.  Reflection

       b.  Refraction

       c.  Power of accommodation

       d.  Persistence of vision

7.   Which of the following colors is least scattered by fog, dust of smoke?

       a.  Violet

       b.  Blue

       c.  Red

       d.  Yellow

8.   The colored light that refracts most while passing through a prism is

       a.  Yellow

       b.  Violet

       c.  Blue

       d.  Red

9.   The amount of light entering the human eye is controlled by

       a.  Ciliary muscles

       b.  Pupil

       c.  Cornea

       d.  Iris

10.   The part of the eyes refracts light entering the eye from external objects?

          a.  Lens

          b.  Cornea

          c.  Iris

          d.  Pupil

1.    B

2.    A

3.    C

4.    B

5.    B

6.    B

7.    C

8.    B

9.    B

10. B