Question

Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see?

Answer 1

I am not very good at Physics, but if you look at a color wheel, you see that the primary colors (of science I assume?) are red, blue, and green. If you take red out of the picture, that leaves blue and green. Mix the two colors and get the color Cyan.

Hope that helps

Answer 2

it is red color in my view guys

Answer 3

as you know, in this situation the red light is blocked and other color of light are passing means Red light is reflected which will b e captured by our retina and we re Red color light ....
did you get it my friend

Answer 4

if the asked question having the word "cancelling" means not getting through the oil layer means @ananata is right...

Answer 5

so we see the red light but it said the red light was cancelled out which is what has confused me

Answer 6

see, there is no cancelling until you got a another beam of same wavelength is coming in opposite. but here is there is only one source.. so , the light having Red Blue and Green passing through a oil layer which is color less (for Now)..

when the light beam hits it.. it should allow some lights to pass through it and some not allowing it..(mainly based on material properties and the light wavelengths)
so in our case.. we considered cancelling as "not allowing" . so the oil will allow green and blue but block the red color. and it will reflect it back, so we see only red color coming towards us from the oil... and finally the color of oil is red.

Examples::
when you see black object, it means, it is absorbing all colors, reflecting none.. so it is black..
When you see white page, it is reflecting all colors, allowing none to pass through.. so it is white..

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