Available Answers

1. 1.

   Define the term transparent objects by giving two examples.

2. 2.

   Define the term translucent objects by giving two examples.

3. 3.

   Define the term opaque object by giving two examples.

4. 4.

   Write True if the statement is correct and False if the statement is wrong for the following statements:

   1. A piece of stone is a translucent object.
   2. A shadow is formed only when an opaque object comes in front of a light source.
   3. The darkness of a shadow is same for an opaque and a translucent object.
   4. Rays of light travel in a wavy fashion.
   5. Transparent objects do not allow the light to pass through them.
   6. All objects form shadows of similar shape and size.
   7. If an object is placed nearer the source of light, then a smaller shadow of the object will be formed.
   8. Lunar eclipse will occur if the moon comes in between the sun and the earth.
   9. Solar eclipse will occur if the earth comes in between the sun and the moon.
   10. Shadows of objects change in length and direction according to the position o light source.
5. 5.

   How are shadows formed?

6. 6.

   On what principle does a sundial work?