Available Answers

1. 1.

   Choose the most appropriate answer.

   1. Which of the following is the best reflector of light?
      1. Wood
      2. Mirror
      3. Cardboard
      4. Wall
   2. An image formed by a plane mirror is
      1. magnified.
      2. diminished.
      3. erect.
      4. inverted.
   3. We see most objects around us due to
      1. regular reflection.
      2. irregular reflection.
      3. refraction.
      4. none of these
   4. If the angle of incidence is 30°, then the angle of reflection is
      1. 15°.
      2. 30°.
      3. 45°.
      4. 60°.
   5. Which of the following is not a primary colour?
      1. Red
      2. White
      3. Blue
      4. Green
2. 2.

   Fill in the blanks.

   1. We are able to see objects because rays of light falling on them get __________________________.
   2. A mirror is made by ________________ one side of a thin sheet of glass.
   3. A smooth and shiny surface _______________ light falling on it.
   4. Diffused reflection spreads the light energy over a ___________________ area.
   5. The speed of light in vacuum is _________________.
3. 3.

   Match the following.

   Column A	Column B
   1. Red + Cyan	a. Magenta
   2. Complementary colours	b. RGB
   3. Secondary colours	c. Yellow, Cyan, Magenta
   4. Primary colors	d. Green, Magenta, White
   5. White - Green	e. White

    

4. 4.

   Define Incident ray.

5. 5.

   Define Lateral inversion.

6. 6.

   Define Regular reflection.