LIGHT

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. The world is largely known through the
2. The sense of is one of the most important senses.
3. alone cannot see any object.
4. It is only when from an object enters our eyes that we see the object.
5. A polished or a shiny surface can act as a
6. A changes the direction of light that falls on it.
7. The ray that comes back from the surface after reflection is known as the
8. The light ray, which strikes any surface is called the
9. A ray of light is an
10. A of light is made up of several rays.