Repost: the answer earlier did not answer the question correctly. I know that \'

Question

Repost: the answer earlier did not answer the question correctly. I know that 'if' we can both see the reflection of myself at 8m, then it will be a real, inverted and magnified image. But does my friend see the image of "me" at (di = 13.3m) and why; please?

A science museum has created a huge concave mirror with a focal length of 5 m, and mounted it so that it covers the entire wall at one end of a long hallway. If you stand on a center line painted down the middle of the hallway, you're on the mirror's principal axis. You and a friend are standing on the center line, you're 8 m from the mirror, and your friend is 20 m from it. Can both you and your friend see the image of you created by the mirror? Explain. (Don't worry about either of you blocking the other's line of sight – you both can crane your heads as needed. The mirror is really, really big.)

Explanation / Answer

Yes, your friend will see an image of you at 13.3m.

The mirror bounces the light rays coming off of you back towards eachother. Where they cross again is where the image of you would be (13.3 m). Ofter they've crossed, they start spreading out again, and they spread out in the same pattern as they were in as they left your body. So, to your friend, it would look like there were two of you. (If the lighting is right. Images tend to be duller than the object making them)

Here's a youtube video that shows a real image, like the one your friend would see of you.

You wouldn't be able to see your image because the light rays that make the image are all heading away from the mirror. none of them would be able to turn around and enter your eye.

For more detail see:

http://www.cramster.com/answers-aug-11/physics/huge-mirror-science-museum-created-huge-concave-mirror-fo_1416175.aspx?rec=0

(Someone posted and answered the same question)

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