4. When does the shadow formed? *

A.When the light rays is blocked by an opaque object.
B.When the light rays is blocked by an transparent object.
C.When the light rays is blocked by an translucent object.
D.When the light rays is trapped by an transparent object.
5. Which object will you choose if you like light to pass through it? *
A.Oblique
B.Opaque
C.Translucent
D.Transparent
6. Which object will you choose if you like some of light to pass through it? *

A.Oblique
B.Opaque
C.Translucent
D.Transparent

7. When does a shadow is shortest? *

A.When the light rays is trapped.
B.When the light rays is under the object.
C.When the light rays is above the object.
D.When the light rays is at the side of the object.

8. It is a tool that uses shadow in telling a time is called... *

A.Barometer
B.Hygrometer
C.Sundial
D.Sundance​