light absorbtion

Question

1.  an object which absorbs most of the light waves which srike it but reflects the blue frequency

 

a.  is opaque and appears blue

b.  is transparent and appers blue

c.  is opaque and appears yellow

d.  none of these

 

I think the answer is a

 

2.  an object which absorbs most of the light waves which strike it but transmits the blue frequency

 

a.  is opaque and appears blue

b.  is transparent and appears blue

c. is opaque and appears yellow

d.  none of these

Answer 1

I would say A is the answer for number 1. 

 

For 2, I would say D is the answer. 

 

This is because if the source light is behind the object, then since we only see blue light going through the object, we would be blue and it would be transparent. However, if we have the source light behind us, and since the object absorbs all color and allows blue to go through, which means no light is reflected back at us, then the object would appear opaque. Therefore, since the direction of the source light matters, the answer would appear to be D.

Answer 2

I would agree with 1 being A. If blue is the only color reflected then it is the only color that your eye can pick up and therefor you will perceive it as blue! The second question, however, is a little tricky. If the object is able to transmit a blue frequency that implies that it is transparent (or more likely translucent). Since all the colors except blue are absorbed the only thing our eyes can see is blue. Therefore, it is transparent and blue!

 

1 A

2 B