تسجيل الدخول

تسجيل

To locate the Image of an Object

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  P-446

2025-12-17

532

If the object is a straight rod like the arrow AB in Fig. 1, it will be necessary to determine the position of the image of each end, only as all intermediate points will be found on the straight line which joins them ...

The paths taken by the rays that enter the FIG. 1 eye at E may be shown by finding the points C and D, where straight lines from the points A' and B' to the eye intersect the mirror. The incident rays, then, will be AC and BD, and the reflected rays will be CE and DE. When the eye is at E, the only part of the mirror used is CD. An eye placed at E' would see the image likewise at A'B', but would use an entirely different part of the mirror.

Demonstrations. - Place a mirror horizontally on a table and look at the image of a candle placed the other side of the mirror from the eye. What kind of inversion is caused by a horizontal mirror? Stand at a distance in front of a small plane mirror placed vertically against the wall Notice how much of your figure you can see; then walk toward the mirror, and observe whether any greater length of the figure can be seen….