Hi Guys,

My car is a rather lovely pink and white marble effect (picture attached) and it has the strange effect of attracting large amounts of flies.

Whenever I returrn to my car on a sunny day it is the only one covered in them...

Any idea why this might happen? I find it odd

Thanks

I was reading in very dim light last night and found that I could not read black text on a white background (the character size was about 8 point) but could read white on a black background. I'm 48 years old and have to wear reading glasses, which I did not have with me at the time.

I expected not to be able to read black-on-white text, but was surprised I could read the opposite. Why is this? It seems counter-intuitive.

Ben Deighton, Halifax, West Yorkshire, UK

My six year old son wants to know if metal can ever be see through, and if so how, and if not why not.

Is the reason that red, green and blue are said to be the primary colours for light due to the fact that humans have red, green and blue colour receptors? If this is so, how do we percieve, say, yellow light? Surely mixing red and green light doesn't give you yellow light, just like mixing gamma rays with microwaves doesn't give you a different sort. What if a source of light gave out just light between 570-590 nm (yellow light), would I be able to see it?

People used to think that light was spontaneous and it is far from obvious that it takes time to travel, so someone must have made the discovery that it does. Who was it and how did they figure it out?

I am short-sighted; if the light from a distant object is bouncing off a mirror into my eyeball, why is it that I still see the object as if I was viewing it without glasses? I imagine the mirror to be "re-emitting" the original light, and if the distance between me and the mirror is equal too or less than that of what allows me to see things without correction, I would be seeing it as clearly as if it were the same distance to me and the object as it is to me and the mirror.

i was looking in the mirror wearing 3D movie glasses (perpendicular polarization for each filter). when i closed my left eye, with my right eye i could see my left eye in the mirror but not my right. why is this? surely if light can go through a polarized filter it should be able to come back through the same one.

We all know that mirrors reverse left and right. My question is this: Is there a material that would put left and right back in the right place without using something like a camera?

Einstein gave the equation e=mc^2 in 1905 but the speed if light was measured in 1949 so what was "c"in e=mc^2?