# reflection and rays

• Feb 26th 2008, 07:41 PM
rcmango
reflection and rays
The drawings show two arrows, A and B, that are located in front of a plane mirror. A person at point P is viewing the image of each arrow.

Which images can be seen in their entirety? Determine your answers by drawing a ray from the head and foot of each arrow that reflects from the mirror according to the law of reflection and reaches point P. Only if both rays reach point P after reflection can the image of that arrow be seen in its entirety.

image: http://img297.imageshack.us/img297/2049/67850153es7.png

so which one is correct?

image of A
image of B
or neither image

I would say image of A?

thanks for help on this one.
• Feb 26th 2008, 10:32 PM
earboth
Quote:

Originally Posted by rcmango
The drawings show two arrows, A and B, that are located in front of a plane mirror. A person at point P is viewing the image of each arrow.

Which images can be seen in their entirety? Determine your answers by drawing a ray from the head and foot of each arrow that reflects from the mirror according to the law of reflection and reaches point P. Only if both rays reach point P after reflection can the image of that arrow be seen in its entirety.

image: http://img297.imageshack.us/img297/2049/67850153es7.png

so which one is correct?

image of A
image of B
or neither image

I would say image of A?

thanks for help on this one.

I've modified your images a little bit to show you how to find the rays.
• Feb 26th 2008, 11:28 PM
rcmango
Okay I think I was confused by the terminolgy. "entirety" do they mean the exact image reflected back?

thats what I understood from this, and thanks for the new diagrams, fits the situation for the problem.

thankyou.