Light Waves

I was hanging out with my friends this weekend and these guys are really into cars and racing.  My friend has a Subaru WRX and its so nice!  Anyways, he has HID lights on his car and its purpleish.  Its because its like 6 or 7K, or 6000K or 7000K.  I forget how bright his lights were.  So he was just showing off at how bright his lights were, and I was like, "OH! THIS REMINDS ME OF SOMETHING WE SAID IN PHYSICS!"

We were talking about waves in class and how they were able to pass through each other.  We said that we can tell light waves travel through each other instead of just combining into one wave because you can shine a flashlight in a lighted room and still see it.  The car reminded me of that because it was still really bright out, but you could see the light from the car.  

The picture is supposed to show this because I'm shining a flashlight in a lighted room and you can still see the light from the flashlight separately from the light in the room.  I was going to take a picture of my friend's car, but I forgot.  

Oh, funny story involving HID lights.  My friend bought 8K headlights for fun, even though they are technically illegal to put in your car because the light is blue.  He decided to put it in his dad's car for fun so he changed it out and replaced them.  While he and his dad were driving in the dad's car on the freeway, a police pulled them over and asked the dad if he knew that his headlights were illegal and the dad said no, because he really didnt know. Then he got this ridiculously huge ticket. So yeah, I thought it was funny.