Dispersion of Light and Rainbow Formation

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Questions and Answers

What is the main function of the cornea in the eye?

  • To refract light rays (correct)
  • To give the eye its distinctive color
  • To protect the interior of the eye from injuries
  • To control the amount of light entering the eye

Which part of the eye controls the size of the pupil?

  • Sclera
  • Retina
  • Lens
  • Iris (correct)

What is the function of the lens in the eye?

  • To provide distinctive color to the iris
  • To focus light on the retina (correct)
  • To control the amount of light entering the eye
  • To protect the retina from injuries

How does a rainbow form according to the text?

<p>Due to the dispersion of white light by tiny drops of water (A)</p> Signup and view all the answers

What is the function of the optic nerve in the eye?

<p>Transmit sensations felt by nerve cells to the brain (D)</p> Signup and view all the answers

Which cells in the retina are sensitive to dim light and sense black and white?

<p>Rods (B)</p> Signup and view all the answers

What is the purpose of eyelids and eyelashes in protecting the eyes?

<p>Trap dust particles (C)</p> Signup and view all the answers

What is the blind spot in the eye?

<p>An area where vision is not possible due to lack of sensory cells (D)</p> Signup and view all the answers

What is persistance of vision as described in the text?

<p>The eye's ability to maintain visual sensation for a fraction of a second after an object is removed (D)</p> Signup and view all the answers

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