i have seen Farsight's link and i can understand why that happens, actually i already knew about that but when i saw this case i couldn't explain with the same logic, can someone tell me if these two cases are the same? cause i am thinking its just an illusion as GOD__AM said
Yea I know i came across this quite randomly and I though i was seeing things at first. I also want to try with other colours but i don't have any bright enough other coloured leds on me so if someone could try it that would be good. Also I have also tryed this in the dark and the shadow is NOT...
I noticed this when I was holding a piece of paper in front of my blue led computer light. when a object (finger) is placed in front of the paper wiht the blue led light shining on it the shadow of the object is yellow. why?
I tried to explain it as yellow is the complementary colour of blue...
hi
can someone please help me with this question "does sunlight affect oxidation of vitamin C" I have seen this as a common science fair topic and I have also done an experiment myself and have found that it does speed up vitamin C oxidation, But I don't know why! can someone please help me...
Hi
Its the holidays and i was just thinking if you have a jar with some water in it and you put it in a freezer say 0 degrees and the jar is constantly being shaken rapidly would the water freeze up over time? or simply if a body of water is moving does the freezing point decrease in...
Hey Thanks for the replies everyone although I am not a physics genius i do believe that in the first scenario it would strenghten the bar magnet but in the second I am not sure and like Wizardsblade said i think something dramatic would happen could some descirbe what would happen or is it...
hi
I was just thinking at school we learned that a current running through a coil of wires with a iron core produces an electromagnet. so if you place a bar magnet instead of an iron core would this strenghten the magnet or if placed in opposite direction render the magnet useless (given that...
In school physics i have learned that the focus for a circular convex(converging) lens is f=r/2 where r is the radius and f is focus. But wouldn't a pair of identical lens made of a different material eg glass and perspecs which have different refractive indexes have different point of focus?