# Is rainbow figure correct ?

1. Aug 14, 2011

### whyonlyme

Is rainbow figure correct ??

1. The problem statement, all variables and given/known data

It's a basic principle that why we see rainbow. I've described information in my attachment.
That figure is given by my teacher, he says to find out mistake in it.

My attempts

I think angles on horizontal lines are incorrect, will anyone explain how I tell it to my teacher ???

#### Attached Files:

• ###### Rainbow.jpg
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2. Aug 14, 2011

### PeterO

Re: Is rainbow figure correct ??

One thing - if you look up a picture of a rainbow - especially a double rainbow - you will notice that the order of colours is reversed in one compared to the other.

That feature is NOT shown in the diagram you included.

3. Aug 14, 2011

### ehild

Re: Is rainbow figure correct ??

Try to trace the light rays - both the blue and the red ones- inside the water drop. You will see then what is wrong with your teacher's drawing.

ehild

4. Aug 14, 2011

### whyonlyme

Re: Is rainbow figure correct ??

What about angles ?? are they correct ??

5. Aug 14, 2011

### DaveC426913

Re: Is rainbow figure correct ??

Yes it is.

6. Aug 14, 2011

### ehild

Last edited: Aug 15, 2011