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Nitish Kumar

· started a discussion

· 1 Months ago

why is it so? (Question: 185980.0 )

Please explain

Question:

How does a blue object under yellow light seem ?

Options:
A) Black
B) Green
C) Yellow
D) Brown
Solution:
Ans:(a) 

Yellow light can be thought of as consisting of red light and green light. A blue pigment is capable of absorbing yellow light. That is, blue paper can absorb both red and green primary colors of light (recall that ). So red and green light shine on the paper; and both the red and the green light are subtracted. There is no color left to be reflected to the eye. Subsequently, the paper appears black.

Y - Y = (R + G) - (R + G) = No reflected light = Black

Knowledge Expert

· commented

· 1 Months ago

Yellow light can be thought of as consisting of red light and green light. A blue pigment is capable of absorbing yellow light. That is, blue paper can absorb both red and green primary colors of light (recall that yellow light is a mixture of red and green light). So red and green light shine on the paper; and both the red and the green light are subtracted. There is no color left to be reflected to the eye. Subsequently, the paper appears black.
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