Light Worksheet-1

Light Worksheet-1

 

  1. A person 1 m in front of a plane mirror seems to be ____ m away from his image.

 

  1. If you touch your-ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with _____.

 

  1. The size of the pupil becomes ____ when you see in dim light.

 

  1. Night birds have ____ cones than rods in their eyes.

 

  1. The ray, which strikes any surface is called _____ ray.

 

  1. The ray, which return back after strike the surface is called _____ ray.

 

  1. A line drawn perpendicular on the incidence point is called _____.

 

  1. The image formed by plane mirror is called ______ image.

 

  1. Reflection from a smooth and shiny surface is called ____ reflection.

 

  1. Reflection from a rough surface is called _____ reflection.

 

  1. The objects which emits the light is called ____ object.

 

  1. Plane mirror forms only a _____image of an object.

 

  1. When two mirrors are set parallel to each other then they form ____image of an object.

 

  1. Splitting of light into its colours is known as _____of light.

 

  1. The size of the pupil is controlled by the_____.

 

  1. Kaleidoscope is based on the concept of_____.

 

  1. The angle of reflection is­­­ _____ to the angle of incidence.

 

  1. The image formed by a plane mirror is ____ inverted with respect to the object.

 

  1. The _____ uses two plane mirror strips each of which is kept inclined at 45° to the axis of the tube.

 

  1. A person 1 m infront of a plane mirror seems to be _____ m away from his image.

 

  1. The size of the pupil becomes _____ when you see in dim light.

 

  1. Night birds have ____ cones than rods in their eyes.

 

Answer Key:

  1. 2

  2. left hand

  3. Large

  4. Lesser

  5. Incidence

  6. Reflected

  7. Normal

  8. Virtual

  9. Regular

  10. Diffused

  11. Luminous

  12. Single

  13. Numerous

  14. Dispersion

  15. Iris

  16. Multiple Reflection

  17. Equal

  18. Laterally

  19. Periscope

  20. 2 m

  21. Bigger

  22. Fewer