Brain Teasers
Where's the Banana?
Fun: (2.68)
Difficulty: (1.65)
Puzzle ID: #28032
Submitted By: Question_Mark Corrected By: zigthepig
Submitted By: Question_Mark Corrected By: zigthepig
Science
Science brain teasers require understanding of the physical or biological world and the laws that govern it.Science
Skid Mark felt like doing a hard challenge one day. Question Mark was very happy to give him a challenge. He took a banana, a sheet of white paper, a red ball, and a few random things and put them all in a room where only red light could be seen. He found the ball and the paper no problem. Why couldn't he find the banana as easily?
Hint
What color is a banana?What color was the light?
Answer
He could not find the banana easily because a banana reflects yellow light and the yellow light goes into your eye. Since there is no yellow light, the banana looked black. The red ball and the paper were easy to find because they both reflect red light and therefore would look red. Skid Mark was really confused because he thought the banana would still be yellow.Hide Hint Show Hint Hide Answer Show Answer
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Comments
this was perrty cool. i didn;t know about the banana with the red light though. good teaser
Good teaser and informative! Nice job!!
I'm more than happy to lose a banana. Could I find some red chocolate instead?
Jan 12, 2006
This is the first teaser
On this site I have read
Though I am not sure
If the room light was red
On this site I have read
Though I am not sure
If the room light was red
NICE ONE!
I Actually got it right!
I Actually got it right!
Good teaser, though I thought it was backwards of actual events. If it was a lit room with red light, and only a certain frequency of red light could be seen, then the black banana would stand out, while the red paper and red ball would be virtually impossible to locate without ... slipping over the banana peel onto them.
Good teaser, i didnt get it though , little too smart for me
Good Job
Good Job
banas reflect yellow light, which is a mixture of red and green light, so it would still be visible
red, green! d finder was blind.
WoW! Ya learn something new everyday! GREAT teaser thanks to the sender ;)
The creator of this riddle obviously had only a low level knowledge of optics. If "only red light can be seen" things appear red or black. The banana would reflect a significantly darker image than the other objects, but I stand corrected in that it would indeed not be black. Either way, I contend that it would be the easiest of the three objects to see.
Mar 16, 2006
I knew it had something to do with how we see colors. . .
It all depends on the background to provide a contrast for the items to show clearly, but we don't know the colour of the walls and floor. If white/red, the banana would show up, if blue/green/yellow etc the paper and ball would show up clearer. (I would have thought).
Mr. Highlevel, Mr. Background and others missed the bus on this one. In Skid Mark's universe bananas are yellow, not black. So to him just change the color it's gone. It's called a teaser...and it was a good one.
Yes, bananas are yellow, and not just in Mark's universe. But they don't look yellow in red light. They absorb red frequencies of light, so appear to be black. That was the point of the teaser. The background surely has to camouflage it though to make it difficult to see.
Great teaser, complaints notwithstanding. A quick Google search yields: YES, yellow light is a mix of red and green light spectrums--more red than green, by the way.
SO: the YELLOW banana peel would REFLECT the red light, making it visibly red, just like the ball and paper. Whether the banana peel seems darker depends on if only one or multiple (visible) frequencies are present, and the frequency(ies) of the available light.
If it IS darker, it depends on the contrast of the surface the items are laying on. Most LIKELY, there will not be a discernable difference, and ALL OBJECTS would be JUST AS easy or hard to find.
SO: the YELLOW banana peel would REFLECT the red light, making it visibly red, just like the ball and paper. Whether the banana peel seems darker depends on if only one or multiple (visible) frequencies are present, and the frequency(ies) of the available light.
If it IS darker, it depends on the contrast of the surface the items are laying on. Most LIKELY, there will not be a discernable difference, and ALL OBJECTS would be JUST AS easy or hard to find.
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