Monday, 8 September 2014

LIGHT


LIGHT

1. When light hits a surface it bounces off. This is called ……………………………….


2. The angle at which light …………………………. from a flat surface is ……………… as   
    the angle at which it hit it.


3. When a beam of light enters a block of glass at an angle its direction changes. This     
     is called …………………..….


4. When a beam of light bounces back from a mirror its speed is ………………………..…   
     the speed of the light before it hit the mirror.


5. When a beam of light enters a block of glass its speed is ……………….……………..…
    the speed of the light when it was moving in air.


6. Light is a form of ……………………………………….. radiation.


7. When white light enters a prism at an angle the red light is bent …………………...
    than the blue light.


8. Write down three uses for flat mirrors:

(a) …………………………………………………………………………………………………..

(b) …………………………………………………………………………………………………..

(c) ……………………………………………………………………………………………………


9. A ………………………………………… lens brings light to a focus.

10. Write down three uses for the type of lens mentioned in question 9.

(a) …………………………………………………………………………………………………..

(b) …………………………………………………………………………………………………..

(c) ……………………………………………………………………………………………………