Light is a part of our everyday life. Having a basic understanding of its proper

Question

Light is a part of our everyday life. Having a basic understanding of its properties is important for us to understand what we see. To begin with this we will start with identifying what you already know. Please do not use the internet. Just answer these of the top of your head. What causes light to have different colors? Use physics to explain your answer. Can light be used to cancel out light? Use physics to explain your answer, (ex. Can light be used like sound is in a pair of noise canceling headphones.) If you shine different colored light on a table what happens to the color of the table? Use physics to explain your answer. If you can see inside a room that means that light exists in the room. Does all the light come only from the light bulbs. Use physics to explain your answer. What causes shadows? Use physics to explain your answer.

Explanation / Answer

1. different wavelengths of electromagnetic radiation are responsible for different colours of light.

2. yes light can also be used to cancel out light if two coherent light rays are allowed to interfere with each other to produce minimum intensity.

3. the colour of the table would appear to be the colour which is refected most from the surface of the table.

4. yes all the light comes from the bulb.

5) obstacles which do not allow light to pass through them would create a region behind them where light does not exist. this region is known as shadow.

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